Use Pyglet 1.2 for OS X
Suggest multiple ways to run in OS X
How to play instructions in README

Key bindings and mouse actions
Merge pull request #18 from RichVel/master

"How to play" instructions in README
Update README.md
Merge branch 'osx-readme' of https://github.com/silent1mezzo/Minecraft

Conflicts:
	README.md
README update for Mac 32-bit issue #7, and installing git+pip on various platforms
Merge remote-tracking branch 'RichVel/master'
Tweak README file.