Explicitly link ACE libraries in yarp executables
Adopted new file loading through ResourceFinder also in gyarpmanager as in gyarpbuilder.

Added search for robot-specific scripts to gyarpbuilder and gyarpmanager;
proposing fix for ResourceFinder with Robot option.
Modified implementation of ResourceFinder for Context case
Remove all custom FindGTK stuff and YARP_USE_GTK2 option

Move the homemade files into a "deprecated" folder and install them
only if YARP_NO_DEPRECATED is not set.