Added basic localStorage-based high scoring
Merge pull request #2 from tomgrim1/master

Added WASD controls for the skier.
Merge remote-tracking branch 'ddoolin/master'
Skier's internal distance tracker is reset on game reset
Lives Left set to 5
Added stuff about contributors to readme
License, also Some short refactoring in skier.js
Added should as a devDependency
New hit method. Unit tests for it.
Fixed bug causing mid-eat skier to move after a tree hit, switched to reactive hitting
Fixed test which required id
Basic jumping support
Updated readme