add cache size perf counters and fix bug where read only instance was deleting existing share
corrections to cache entry sizing.
added a few more missing items to file cache entry accounting.  fixed compile bug on OSX.  corrected cache2_test for new accounting.
correct memory leak in flexcache_test (options.filter_policy)
Merge pull request #105 from basho/mv-flexcache5

Mv flexcache5