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Added Installation and Update Information and other general updates

... since I have no Oculus ;) but it should be easy to get it to work once someone tests it with oculus

Now to install you do:
git submodule update --init --recursive --remote

And for later updates you do:
git submodule update --recursive --remote

shader changes to identify the current eye, and render accordingly (requires patched blender - http://www.pasteall.org/57722)