Mapping File Enabled
@ Create class ensmartParser to obtain Ensembl-GOID mapping
@ Update public member function "createMappingFile" to class OBOPaser
	-- Tested using Sc (Yeast) EnsMart database and GO ontology database (v1.2, 20130720)
@ So far, all the three files: Name File, Path File and Mapping File can be successfully produced
	--  Time complexity of this program is a little high when debugging ( about 30 minute to create all files)
	--  It would be quicker when normal running.
@ Code annotations should be completed when the functions are ensure to be OK.