added support for extending object and connections
removed signupwithfacebook
added support for uriencode and decode for queries
merged with master
added extension methods for find,get,mutiget,multidelete in object and connection
renamed extension methods for object and connection
updated documentation with extend for object
fixed an issue with file download
removed redundant file download calls
added mutlivalued and atomic increment/decrement support
fixed an issue with atomic increment/decrement
added tests for multivalued properties and atomic
updated documentation for multivalued, counter and extend
added a fix for extending connections
Merge branch 'master' of https://github.com/chiragsanghvi/JavascriptSDK