Adding MongoTripod require
Removing references to SimpleGraph
Adding require for ARC to ExtendedGraph
Updated extendedgraph to define ARC_DIR if not defined. Added a .gitignore file and removed .idea files
Reverted code back
Merge pull request #2 from talis/Updated-ARC-path

Added .gitignore
Merge branch 'master' into tripod-table-modifiers

Conflicts:
	.gitignore