fixed issue with session save trying to save duplicate files.
Added GREAT analysis conducted with a background set support.  (question of which type of pvalue you want to use still popping up which is shouldn’t because in this type of analysis only hypergeometric is avaiable.)
Merge commit 'a6b832f5906f8ae521f7a2a638c35a08dc3e15ff' into AutoAnnotate

* commit 'a6b832f5906f8ae521f7a2a638c35a08dc3e15ff':
  Added GREAT analysis conducted with a background set support.  (question of which type of pvalue you want to use still popping up which is shouldn’t because in this type of analysis only hypergeometric is avaiable.)
  fixed issue with session save trying to save duplicate files.

Conflicts:
	EnrichmentMapPlugin/src/main/java/org/baderlab/csplugins/enrichmentmap/actions/EnrichmentMapSessionAction.java