Add new RpcRawCommand to get []byte represtation of reply instead of
btcjson.Result.
Export ReadResultCommand to allow caller of RpcRawCommand to deal with
the reply in the same way RpcCommand does.
Adjust test code to for the above changes.
Add return types for serveral additional commands.
Fix required vs. optional arguments for createrawtransaction.
Update tests and test coverage for all changes.
Following the example of bitcoind and the bitcoin wiki, provide a
function to convert floats (which are returned by the json-rpc server)
to int64 (which is the normal representation for most values involving
bitcoins).
Since we already have the specific username and password we want to strip
from errors, use a specific search string rather than a generic regular
expression. This is quite a bit more efficient than using regular
expressions and also has the benefit of being more accurate.
Also, rather than using the added overhead of fmt to convert the error to
a string, just call Error() directly on it to get the string.
Finally, instead of just stripping it, replace it with the literal
string "<username>:<password>" to avoid any possible confusion in the
error messages where it might otherwise appear the url was being
constructed incorrectly.
ok jcv@
