Starting article 05
Comments + making shaders part of `Asset`
More code comments in article 05
Rename Asset/Instance to ModelAsset/ModelInstance
Reverting to vertex shader from prev article

The fewer changes per article, the better
Article 05 code is done for OSX
Article 05 windows code done
Fixed some build warnings on windows
Fixing more windows warnings
.gitignore ignores xcodebuild output
Updating README with article 05
Merge remote-tracking branch 'upstream/master'