Fix compile issue
merge from upstream/master
Merge branch 'master' of https://github.com/HackFisher/bitshares_toolkit
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
fix rpc bitcoin_getaddressesbyaccount
Merge remote-tracking branch 'upstream/master'
implement rpc bitcoin_sendmany
Merge remote-tracking branch 'upstream/master'
bitcoin_sendmany types
add transfer asset to address
Merge remote-tracking branch 'upstream/master'
Finish implementing bitcoin rpc api, to add testcases.
Merge remote-tracking branch 'upstream/master'
imported key could be connected to some contact key
Merge remote-tracking branch 'upstream/master'
Merge pull request #249 from HackFisher/master

finish implementing bitcoin rpc api