Please, make it compatible with bitcoin v0.7

[rafaeldotjs]

bitcoin v0.7 doesn't work with getmemorypool anymore, and getblocknumber was replaced with getblockcount

[mbbx6spp]

I realize this is stale but I figured I might take a stab at submitting a pull request next week when I have time. Specifically what needs to be done here is:

• Replace getblocknumber with getblockcount
• Replace getmemorypool with getblocktemplate, submitblock, getrawmempool.

Source: https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_calls_list