Fix bugs on new interfaces and their implementations... see description.

IControlLimits2Impl.h:   removed '=0;' at the end of the declaration (this is the implementation file);
IPositionControl2.h:     added missing VOCAB_MOTION_DONE_GROUP, corrected comment;
IPositionDirect.h:       removed 'const' within the setPositionsRaw declaration;
IPositionDirectImpl.cpp: added missing initialize function;
IPositionDirectImpl.h:   removed '=0;' at the end of the declaration;
Implemented new interfaces into RemoteControlBoard class

new interfaces are IPositionControl2, IPositionDirect, IControlLimits2Impl, IVelocityControl2