PWA-ify Wormy (#14)

Update lobby server location.

Merge branch 'master' into gh-pages

Add key to get started to intro page.

Use www in websocket url.

drawSprite cleanups (#13)

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Update README.md

Use requestAnimationFrame to drive main game loop.

Fix missing semicolon (#12)

Don't use a real connection to connect to local server.

Fix cross origin failure when serving from rawgit.

Avoid changing game start time on loading new level to avoid potential races.

Only move the touch pad if the screen is wide enough.

Update request logic.