[conformal/btcwallet] 677ec1: Convert all tx results to use new concrete type.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwallet
  Commit: 677ec10ee737f5d9049d6ca718d86184b77f2f59
      
https://github.com/conformal/btcwallet/commit/677ec10ee737f5d9049d6ca718d86184b77f2f59
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-04-10 (Thu, 10 Apr 2014)

  Changed paths:
    M account.go
    M acctmgr.go
    M rpcserver.go
    M tx/tx.go

  Log Message:
  -----------
  Convert all tx results to use new concrete type.

This commit modifies all code paths which work with transaction result
objects to use the concrete ListTransactionsResult provided by the btcjson
package.  This provides nicer marshalling and unmarshalling as well as
access to properly typed fields.