Update README.md

modify the binary download address
Merge branch 'workspace'
add command getrewardbyaddr
modify function getrewardbyaddr the ret
GenerateBitcoins add join_all()
recover previous vesion
getinfo function add lotto id.
fixed invalid lotto transaction bug.
modify welcome tips
modify rpccommand hex to dical
improve the version

Signed-off-by: spark.huang <240401736@qq.com>
Merge remote-tracking branch 'remotes/loc_dsvalue/master'
Merge remote-tracking branch 'remotes/loc_dsvalue/master'