Add ability to send binary content on the RPC service

```
Right now content is sent in Base64 encoded format. However, this leads to some 
XML processing errors if the encoded data has some characters like the EOF 
character.

Looking for a way to send binary content over the socket as part of the RPC call

```

Original issue reported on code.google.com by `openmobs...@gmail.com` on 12 Sep 2013 at 7:25
