Fix bad ref to scoreflex object in Scoreflex.SDK.submitTrun
correction variable initialization
add utility functions

Function.prototype.bind method
isArray is Helper object
Add local details to challenge instances

local details correspond to a local cache for challengeInstance details
add Challenges.getInstances and update Challenge.get methods

Challenges.getInstances method request for instances and return the raw json
Challenges.get method now takes a third argument to initialize localDetails
add watchers for challenges

watchUpdates enables an event to be triggered when a challengeInstance updates.
watchAllNew enbales an event to be triggered when a new challengeInstance instance appears (invitation or yourTurn)
exposes more Challenges methods (getInstances and watcher methods)
update documentation
update documentation tutorials
add timing function and scheduler object to ease watchers use
correction documentation
Merge remote-tracking branch 'origin/dev' into realtime

Conflicts:
	scoreflex.js