Adds support for compiling against Qt5. This affects the Marble library
and the Marble Qt Desktop application. When compiling against Qt5,
the Marble KDE Desktop application is not build (porting to KDE
frameworks 5 is yet to be done).

If both Qt4 and Qt5 are installed on the system, Qt4 is chosen by
default. It can be overriden using the QT5BUILD=TRUE cmake variable.
When building against Qt5, cmake will emit lots of
CMAKE_AUTOMOC_RELAXED_MODE related warnings. Please ignore them.

REVIEW: 113392
FEATURE:

Squashed commit of the following:

commit 90286f9a
Merge: b47483d2 2773f06a
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Wed Oct 30 18:18:27 2013 +0100

    Merge branch 'master' into qt5

commit b47483d2
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Wed Oct 23 10:53:18 2013 +0200

    Have cmake set fpic option

    Hopefully it is smart enough to determine the correct setting based
    on operating system / compiler. Might suppress warning messages in
    windows/mingw.

commit 04acc49b
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Wed Oct 23 09:07:18 2013 +0200

    Link against qt sql libraries

commit 9a7e86de
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 19:42:44 2013 +0200

    Determine build flags automatically where possible.

    - If Qt4 is not installed, but Qt5 is, do a QT5BUILD automatically
    - If both Qt4 and Qt5 are installed, use Qt4 unless user sets QT5BUILD
    - When doing QT5BUILD, do a QTONLY build (KDE frameworks 5 support tbd)

commit 6600b366
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 18:50:44 2013 +0200

    Reuse MARBLE_PLUGIN_INSTALL_PATH.

    Do not handle KDE vs Qt build specially wrt plugin install path. Also
    enables non-system installation for QTONLY=OFF width designer plugins.

commit 94270cf0
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 18:50:24 2013 +0200

    Remove duplicate macro

commit b6c66aa9
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 18:49:51 2013 +0200

    Support building qt designer plugins with qt5

commit 43ac9240
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 17:22:16 2013 +0200

    Fix typo

commit 2f52806b
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 17:18:25 2013 +0200

    Don't use NULL. Use 0.

commit c75c1998
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 17:11:10 2013 +0200

    Fix typo

commit 75c0e416
Merge: 2788ad89 a356329a
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 17:06:30 2013 +0200

    Merge branch 'master' into qt5

commit 2788ad89
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 14:35:20 2013 +0200

    Include marble_export.h for the Q_PLUGIN_METADATA definition with qt4

commit 7696304f
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 14:22:22 2013 +0200

    Move if() clauses out of include_directories command.

    Not sure if newer cmake versions allow that syntax, but the statements
    end up as-is in include directory commands here (cmake 2.8.11.2) which
    confuse g++.

commit f32eda23
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 14:20:18 2013 +0200

    Fix class name in typedef

commit 90d113b9
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 14:01:11 2013 +0200

    Remove -qt=qt5 option which is unknown to qmake in qt 5.0 at least

commit 59d45806
Merge: fce79d75 b5acbb90
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Oct 20 11:29:11 2013 +0200

    Merge branch 'master' into qt5

    Conflicts:
    	src/plugins/CMakeLists.txt
    	src/plugins/qt-components/CMakeLists.txt
    	src/plugins/qt-components/QtComponentsPlugin.h
    	src/qt-components/marble-touch/CMakeLists.txt

commit fce79d75
Author: Michael Zanetti <michael_zanetti@gmx.net>
Date:   Sun Sep 22 21:40:01 2013 +0200

    fix qml components install dir for Qt5

commit 82ea5526
Author: Michael Zanetti <michael_zanetti@gmx.net>
Date:   Tue Sep 17 22:44:55 2013 +0200

    make marble-touch compile with qt5

commit 763837ff
Merge: 8f8a6834 63294506
Author: Michael Zanetti <michael_zanetti@gmx.net>
Date:   Tue Sep 17 21:46:06 2013 +0200

    Merge branch 'master' into qt5

    Conflicts:
    	src/lib/StackedTile.cpp

commit 8f8a6834
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Sep 1 16:44:12 2013 +0200

    QtMobility only works with Qt4

commit c1f8c6f6
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Sep 1 16:39:52 2013 +0200

    Port roleNames() to Qt5

commit e29cc404
Merge: 4c9ba04b 5543d999
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Sep 1 16:29:28 2013 +0200

    Merge branch 'master' into qt5

    Conflicts:
    	src/lib/NewstuffModel.h
    	src/lib/routing/SpeakersModel.h
    	src/plugins/declarative/MapThemeModel.cpp
    	src/plugins/declarative/MapThemeModel.h

commit 4c9ba04b
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Fri Aug 30 20:12:30 2013 +0200

    Guard QT_USE_FILE include against Qt5 build. Add missing include dir.

commit 77bd5705
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Thu Aug 29 23:29:56 2013 +0200

    ported tests to Qt 5

commit f5b7e6ac
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Thu Aug 29 22:05:51 2013 +0200

    all plugins ported to Qt5 (components plugin's QML files not ported yet)

commit ae390969
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Thu Aug 29 21:54:47 2013 +0200

    marble-mobile ported to Qt5

commit 22cd33d6
Merge: db5fec5e eb4206dc
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Thu Aug 29 21:38:33 2013 +0200

    Merge branch 'master' into qt5

    Conflicts:
    	MarbleMacros.cmake
    	src/CMakeLists.txt
    	src/lib/CMakeLists.txt
    	src/plugins/render/earthquake/CMakeLists.txt
    	src/plugins/render/elevationprofilefloatitem/CMakeLists.txt
    	src/plugins/render/elevationprofilemarker/CMakeLists.txt
    	src/plugins/render/navigation/CMakeLists.txt
    	src/plugins/render/opendesktop/CMakeLists.txt

commit db5fec5e
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Thu Aug 29 21:32:25 2013 +0200

    ported runner plugins to Qt5

commit e7898acf
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Sun Aug 25 16:26:26 2013 +0200

    don't use QDeclarative typedefs in headers

commit 46c614fd
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Aug 25 15:28:26 2013 +0200

    Provide Q_PLUGIN_METADATA needed for plugin loading with qt5

commit 0c1a3d42
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Aug 25 15:27:15 2013 +0200

    Phonon only works with Qt4.

    Including it anyway leads to linking against both qt4 and qt5 which
    results in a segfault at runtime during plugin loading.

commit b457c410
Author: Dennis Nienhüser <earthwings@gentoo.org>
Date:   Sun Aug 25 15:09:47 2013 +0200

    Fix declarative plugin installation path

commit 87dd04a0
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Sun Aug 25 14:34:05 2013 +0200

    make new cloudsync code work with Qt5

commit c15282ba
Merge: 49c2920e 39727c59
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Sun Aug 25 14:30:43 2013 +0200

    Merge branch 'master' into qt5

    Conflicts:
    	CMakeLists.txt
    	src/lib/AbstractDataPluginModel.cpp
    	src/lib/ServerLayout.cpp
    	src/tilecreator/CMakeLists.txt

commit 49c2920e
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Sun Aug 25 14:03:36 2013 +0200

    typdef QDeclarative -> QQml/QQuick as much as possible

commit b48c6a90
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Sun Aug 25 13:53:19 2013 +0200

    remove debug message

commit 485dfc56
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Sun Aug 25 13:51:30 2013 +0200

    finish porting plugins to Qt5

commit aab97586
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Wed Aug 21 23:47:40 2013 +0200

    compiles and runs with Qt5. Plugins and tests disabled for now.

commit f5adf6ee
Author: Michael Zanetti <mzanetti@kde.org>
Date:   Sun Aug 4 16:26:18 2013 +0200

    use cmake automoc for cmake version >= 2.8 and QT5