[conformal/btcwallet] b14586: Implement clean ^C shutdown and add the stop RPC.

[Josh Rickmar]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwallet
  Commit: b145868a4bc5e8bd9fec82afc0a806e0d2529f67
      
https://github.com/conformal/btcwallet/commit/b145868a4bc5e8bd9fec82afc0a806e0d2529f67
  Author: Josh Rickmar <jr...@conformal.com>
  Date:   2014-06-24 (Tue, 24 Jun 2014)

  Changed paths:
    M account.go
    M acctmgr.go
    M cmd.go
    M disksync.go
    M rescan.go
    M rpcclient.go
    M rpcserver.go
    A signal.go

  Log Message:
  -----------
  Implement clean ^C shutdown and add the stop RPC.

Closes #69.