Removed dependency on tr1/functional_hash.h
Removed dependency on tr1/functional_hash.h

jadecastro/slugs,johnyf/slugs,LTLMoP/slugs,jadecastro/slugs,johnyf/slugs,johnyf/slugs,LTLMoP/slugs,jadecastro/slugs,LTLMoP/slugs,LTLMoP/slugs,LTLMoP/slugs