* Separate emulation back-end from view.  Removed all references to TEWidget ( the terminal display )
  from the emulation classes.  Connection of widget input keyboard/mouse notification to emulation
  is now done in TESession::addView().
  Added warnings for things which have/may have broken temporarily due to this change.
* Removed the concept of 'connected' / 'not connected' from the emulation classes.  Their behaviour
  is now independant of whether or not views are connected to the emulation.
* Added ScreenWindow::scrollBy() method which scrolls a screen window relative to its current position.
* Fix signal/slot connection in emulation when creating a new screen window.


svn path=/branches/work/konsole-split-view/; revision=642513