Merge pull request #13 from themetalmuncher/master

Fixed engine debug and minor improvements
[updated] credits
[added] version to mainmenu
[fixed] wrong height on uneven wheelcount
[fixed] loading background
[added] xbox controller messages
[added] controllertest
[added] xbox messages
[added] experimental vehiclechooser
[updated] credits
[improved] cursor
[fixed] resizing bug in vehiclechooser
[fixed] chat url
[added] polymer
[fixed] syntax in play.html
[removed] metallic-option in vehiclechooser
polymer tests
[reimplemented] vehiclechooser
[fixed] height of vehiclechooser dialog
[added] imagesupport
[added] imagesupport for brands
[changed] brand searchpath to use "_" instead of "-"
[fixed] small bug
[improved] vehiclechooser: doesn't reset anymore, config is only shown when needed
[improved] vehiclechooser
[added] steaminfo
[added] underscore.js lib
[fixed] url's using file://
[fixed] gui hiding
[added] automatic gears to tacho-app
[added] steam integration
[added] version/changelog
[improved] simpleperftimer app, now has metric/imperial