Fix issue #31.
Partially fix #47 (deselected feature are now stored in (and read from)
the internal config file; The user is not forced to use the advanced
configuration editor, if deselected features are loaded).
Partially fix #26 (enabled coloring for advanced page).
Simplified the advanced configuration editor (user can use left and
right mouse click, instead of double click)
Added function to display short feature names for MPL feature models.
Removed extendedConfigurationReader for interface projects (was now
unnecessary).