SciDAVis - Improvements SVN-temp

- added a mechanism to customize application-wide/module-wide
keyboard shortcuts (ActionManager)
- added a dialog class which records key combinations from
the keyboard and assigns them to an action managed
by an ActionManager (ShortcutsDialog)
- added a "keyboard shortcuts" entry to the edit menu in
ProjectWindow which opens a ShortcutsDialog
- implemented action management/keyboard shortcut customization
for Table

- Fixed icon resource files (broken in r822).
- ImageExportDialog remembers page orientation.

- Changing config.pri now triggers recompilation of core/staticplugins.cpp.
After changing MODULES, a simple "make" will now suffice to update everything.
- Some minor fixes.

- fixed several issues in Matrix and related classes

Some improvements regarding const-correctness:

Signals of AbstractAspect and AbstractColumn are emitted from within undo
commands. Hence, changing the originator in reaction to these signals is almost
certainly a bug. In other words, the pointer to the Aspect/Column being changed
is conceptually const.

Likewise, having a filter change its inputs is dangerous and should be
discouraged. SimpleMappingFilter needs some rethinking; if possible in the
context of an actual use case.

- implemented the first draft of the matrix module
(compiles, but still needs work and testing)
- added matrix icons using the same style as the table icons
- some minor changes to Table and related classes

Added installation targets for desktop integration files (.desktop, mime info, icons).

Added French comments to .desktop files and mime package. Thanks to erictanguy.

- Added missing files and options to the modular build system and removed old
build files. Some bits deliberately not ported:
CONFIG+=thread win32:DEFINES+=Qt_THREAD_SUPPORT: We don't use threads.
DEFINES+=QT_PLUGIN: Added automatically if CONFIG contains plugins.
win32:DEFINES+=QT_DLL: We're not building DLLs.
QT+=qt3support: Try to port everything to pure Qt4. If necessary, this flag
can be temporarily added again for individual modules.
- Removed resource.h, which was only used by iPlot.rc, which has been removed.
- Some consistency improvements in Project.
- Started to re-integrate scripting support.

Added XML mime info file according to current freedesktop.org standard.