Revert "made lib/opal/phaser.rb look more like opal-firebase"

This reverts commit fde18f069e51f0929a88de339d965a4c536457e6.
Merge branch 'master' of github.com:orbitalimpact/opal-phaser

* 'master' of github.com:orbitalimpact/opal-phaser:
  Update README.md
  Create README.md