Get hashes group from Berkeley DB
Created new implementation for version 2
Modified name of berkeley db accessor
Removed the redundant source code
Fix issue will crash the server if we have terabytes of blobs
Fix issue crash server
Modified Blob and BerkeleyDbAccessor classes
Fix issue too much stuff going on in one line
Merge pull request #2 from dangokuson/master

stage 2, API to efficiently find new blobs