Added project adapter for m2e 1.3.
Renamed c.g.h.m.c.portability.impl.m2e_1_3 to c.g.h.m.c.portability.impl.m2e_1_2.
Removed unnecessary export in c.g.h.m.c.portability.impl.m2e_1_4.
Removed unnecessary (inherited) groupIds.