Dynamic Theme Loading

Added: Themes are now loaded and included into each other dynamically through the registry.
Small Fixes

Fixed: The default font file is now called "default".
Fixed: The no file right exception now has the correct serial version uid.
Fixed: Some style issues.
More Fixes

Fixed: The system viewer gui now works better.
Fixed: Some JavaDoc-issues in the registry.
Terminal (Shell GUI!)

Added: The Terminal (a shell gui). This is the first iteration of the gui and the program will change in the future.
Fixed: Lash (our shell) now gets generated by the simulation generator.
Note: Changed the "Launch"-program to a terminal; launch menu will come soon!