Added DebugBufferCache, andr emoved internal pin and latch counting in BTree. Started cleaning work on the BTree. RTree currently has compile errors, will fix them when cleaning is done.

git-svn-id: https://hyracks.googlecode.com/svn/branches/hyracks_btree_updates_next@604 123451ca-8445-de46-9d55-352943316053
17 files changed