Update README.boxeebox

Updated README.boxeebox to follow other style convention.  Also added more information (eg. how to run XBMC via telnet).

Would appreciate the build dependency section filled in by either devil-strike or SpaceOgre (I'm not a builder).
Merge branch 'patch-1' of https://github.com/cryptok/boxeebox-xbmc
Add apt-get line back in.
GLES2 headers are in a different place now apparently.