Bugzilla C/C++ XML-RPC proxy version 0.0.1 released

This is a minor not feature-complete release, it only has the C bindings and no C++ support yet, currently you can only do a few things with it like:
* Retrieve bugzilla server installation version
* Retrieve bugzilla server installation timezone
* Login/logout to/from the Bugzilla server
* Retrieve a list of field values for a specific field in a specific product
* Submit a bug to the server