Massive overhaul

Hey Daniel, here's what I've done:

1. Integration of entire WordPress XML-RPC API spec as of today
2. Re-do some tests, still only have about 5% test coverage. Definitely need to do some work here.
3. Rename methods to WordPress method names
4. Add test method to main module
5. Turned of SSL by default for easier testing (was not working on my machine) and added this to README
6. Added GEMSPEC
7. Stole deep_merge from Rails and added it as a method to make it easier to merge in multi-layered options

I know that you wanted tests for everything, but considering I added the entire API to spec, I haven't gotten around to writing the tests yet. It is next on my to-do list, for real! But some help with doing that would be great.

I'd also be happy to take over this repo if you'd prefer. I have some good experience developing for WordPress and Ruby stuff!