code cleanup, cosmetic changes
added node, updated chunks documentation
addede *KeySelector to BloomSHAI.Member()
dropped callbacks
preliminary work on MemCache
fixed bug in determining IDMap.Size()
MemCache.Add(), *Count(), and tests
minor edits; tests succeed
registry.go edited to reflect change in IDMap interface
add countingBloom test, which succeeds
admin_client.go
cleanup prior to merge