added remove_dupilcates, not tested yet. 	modified:   ch10/mergeable_heap.hpp
added remove_dupilcates, not tested yet.
	modified:   ch10/mergeable_heap.hpp

Mooophy/CLRS,opensourceDA/CLRS,tushar2708/CLRS,opensourceDA/CLRS,tushar2708/CLRS,opensourceDA/CLRS,Mooophy/CLRS,tushar2708/CLRS,opensourceDA/CLRS,tushar2708/CLRS,Mooophy/CLRS,Mooophy/CLRS