Use CocoaPods rather than git submodules and dumping stuff in lib/include.

# IMPORTANT

I have not "pushed" this pod up to the CocoaPods repo (since I am not the author). The final steps are outlined here: http://guides.cocoapods.org/making/making-a-cocoapod.html#release

## TL;DR

From the VideoCore directory:

```term
$ pod lib lint
$ git add -A && git commit -m "Release 0.1.0"
$ git tag '0.1.0'
$ git push --tags
$ pod trunk push VideoCore.podspec
```