SciDAVis - Improvements SVN-temp

- renamed imageExportDialog to ImageExportOptionsDialog (ImageExportDialog already defined in filedialogs.h)
- ported ImageExportOptionsDialog to Qt4
ApplicationWindow:
- changed all "dialog->showNormal()" to Qt4 style "dialog->exec()"
- fixed duplicate keyboard shortcuts (also in graph.cpp)

- ported FindDialog to Qt4
- fixed a bug in Folder::findWindow
- did some code "beautification" in some dialogs I ported earlier

- ported RenameWindowDialog to Qt4
- removed Qt::Tool flag from many dialogs because this
leads to wrong behavior when switching to other
applications and back
- did some code cleanup (mainly removing unneeded #includes)

changes to ApplicationWindow:
- changed several strings in order to unify capitalization
in menus, tool tips and error messages
- fixed some spelling errors
- removed some useless code defining empty keyboard shortcuts

- ported SortDialog to Qt4

- ported class Note to Qt4
- tweaked the way ApplicationWindow's status is set to modified/unmodified a little bit

- ported some more parts of ApplicationWindow (lists, text edits)
- ported analysisDialog and renamed it to DataSetDialog
(this fits the dialog's function much better)

- ApplicationWindow: ported all actions and tool bars to Qt4
- adjusted the icon sizes of the toolbars
(Qt4 default size was a waste of space)
- resized the "save project" and "new matrix" icons
to look better in the toolbars
- did some code cleanup
- changed version to 0.9.0alpha1

- ported myWidget to Qt4 and renamed it to MyWidget

- code evaluated or executed in a ScriptEdit uses the correct context
- users can now set local variables also when evaluation code (e.g. when
setting column/matrix values)
- fixed bug that kept errors from being reported when evaluating expressions
in a ScriptEdit
- fixed superfluous-newline bug in restore of axis formulae