Store: add docs for COBranchRevisionReadingOptions constants. Remove some dead code. Fix -clearStore not clearing backing stores (only affects test suite.) Move tests for -revisionInfosForBranchUUID to a new file and expand. NOTE: I'm not sure how we should interpret COBranchRevisionReadingDivergentRevisions. We need an easy way to get all revisions in the backing store (not currently exposed in the public api) - I want this for drawing the graph in ProjectDemo.

git-svn-id: http://svn.gna.org/svn/etoile/trunk/Etoile/Frameworks/CoreObject@10115 7b3f36aa-e6db-49c1-8b4c-66eac1997e64