Merge pull request #1 from asarazan/master

Create Podspec, move runtime files to correct directory structure
[ARM64] rebuilt with ARM64 support in the fat binary

- fixed build script to use xcode 5 build folder structure
- copied new binary to the root bin folder
[Documentation] Updated readme
Update README.md
[Binary] added a "thin" binary that omits I386 for smaller deploys
Remove what appear to be duplicate declarations

CodedOutputStream.h was failing to compile. This may fix it?
Merge branch 'master' of github.com:asarazan/protobuf-objc