SciDAVis - Improvements SVN-temp

is managed; the new solution avoids constant creation of
new menus or actions/slots as well as cluttering the menu bar with
lots of inactive menus
- renamed the "Outer" functions in AbstractAspect to "prepareAspectRemoval()"
and "completeAspectInsertion()" and implemented them for Table
- added ActionManager and project menu support to Matrix
- added lib/macros.h for things like the ACCESSOR macros
- removed some obsolete/superfluous code