Thread safety fixes for TCint
Thread safety fixes for TCint

-use thread_local for statics which are being used as return values
-use C++11 initializers to allow static containers to be const
-add lock to protect fgSetOfSpecials

Dr15Jones/root,Dr15Jones/root,Dr15Jones/root,Dr15Jones/root,Dr15Jones/root,Dr15Jones/root,Dr15Jones/root