SciDAVis - Improvements SVN-temp

- fixed a typo

- ported MatrixSizeDialog to Qt4

- Added a tool button for drawing lines
- Added the possibility to resize lines/arrows using the mouse
- Fixed some bugs in the graph.cpp file
- Modified the build procedure: liborigin will no longer be shipped with QtiPlot starting with the next official release (0.8.6)

fixed bug pow() bug (muParserScripting)

-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)