Fix typo in CHANGELOG
added null check on localstorage
Merge pull request #305 from agmcleod/hotfix/localstorage-null

added null check on localstorage
changed to double bang to ensure we are getting a truthy/falsey return
Merge pull request #306 from melonjs/hotfix/localstorage-handle-falsey

changed to double bang to ensure we are getting a truthy/falsey return
Merge remote-tracking branch 'origin/master' into ticket-103-clean