SciDAVis - Improvements SVN-temp

-Improved the help browser: it can be used as a stand-alone application.
-The command line qtiplot -h(--help) will launch the help browser from now on.
-The error messages rising from wrong command line options are from now on translated accordingly to the users's locale settings.
-Fixed bug in ApplicationWindow::restoreWindowGeometry(): the project explorer order now displays the correct status of hidden windows when opening a project file.

- closing branch "port_dialogs_to_qt4" because it's obsolete and useless now

- fixed duplicate keyboard shortcuts in ApplicationWindow and Graph

- 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)