Reorganize code.

I carefully reorganized the code to follow with the current standards. I left all the code the same. I just moved files and made some project changes (which changed OCMock.xcodeproj).

The changes I made are based on this post:
http://www.mulle-kybernetik.com/forum/viewtopic.php?f=4&t=235&sid=4b1f4b0f0322a82e2b82aa29d3b0f7a8

I moved the iPhoneExample to a separate repository and modified it to include OCMock as a git submodule and to add it to the project as a cross-project reference. Check out the instructions I added to the GitHub readme. Feel free to move them to your site. Also, feel free to clone the repo below (instead of forking it) and create the repo on your github account.

https://github.com/acani/OCMockSampleAppIOS

Cheers. You should be able to merge this right in by viewing this on the GitHub website and clicking a button below.