Added -testBranchesAccessors that validate the behavior documented in 
-branchForUUID:

To do so, -deletedBranches has been corrected to match the documentation (the 
behavior is now symetric to -deletedPersistentRoots).


git-svn-id: http://svn.gna.org/svn/etoile/trunk/Etoile/Frameworks/CoreObject@10252 7b3f36aa-e6db-49c1-8b4c-66eac1997e64