Website overhaul, many additions & visual changes

Restyled front page visually similar to Glitch's last gold version
webpage.
Added new logo assets (with text and without).
Added street sprit asset.
Added 'About' page, with information on the game.
Added 'Features' page to keep track of versioning and current game
features. Content unfinished.
Added 'Blog', currently using Tumblr. Unfinished and requires further
styling.
Added 'Help' page to address common issues and bugs. Content unfinished.
Modified header to accommodate new links and new logo. Added specific
support for mobile device, styled as a web app.
Modified footer to include social media links and wercker.
Added twitter string to all pages aside from landing.