Program `qmltyperegistrar` does not perform full lookup, for the base class
wrapped in some namespace, according to C++ lookup rules. This resulted in
generating incomplete QML type info for classes, which extended some base
class wrapped inside a namespace and when its fully qualified was not
provided.

FileInfo.fileName() does not recognize Windows-style directory separators.

Note: WiX has troubles with UTF-8 in "wxs" files.

The above file tags were removed from artifacts as they intent is to invoke
resource compiler and pack tagged files as cpp-file-based rousources, which
is not desired for simple QML extensions.

Rule now accepts only `cutehmi.qrc` file tags instead of generic `qrc`, so
that rules from `Qt.core` module do not produce redundant `cpp` resource
files (module `cutehmi.rcc` produces binary resource file).

Additionaly fix license footer.

The module dependency is added to all relevant Qbs items. This dependency
is conditional. Root project has `windeployqt` property, which enables it.

Because _windeployqt_ requires a binary file to be specified, workaround
was needed to handle simple QML extensions, which do not provide their own
binary files.

Additionaly Qbs Extension items were given `extensionType` property.