 Change minimum version to 5.0 
 Change minimum version to 5.0 

changing the minimum version of CMAKE_CXX_COMPILER_VERSION  from 4.8.0 to 5.0
AmeBel/atomspace,AmeBel/atomspace,rTreutlein/atomspace,rTreutlein/atomspace,AmeBel/atomspace,rTreutlein/atomspace,rTreutlein/atomspace,rTreutlein/atomspace,AmeBel/atomspace,AmeBel/atomspace