Enable faster mining for debug builds (lower initial difficulty so that it's easier to register keyhoteeIDs in the blockchain)
Again reducing memory used for hashtable (apparently we have duplicate code for hashtable here in BitShares and in miner code). Probably these codes should be consolidated.
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of github.com:vipjeffreylee/BitShares