Cenny.js v2.3

***Cenny.js now works online, as well as offline. If a user goes offline while using your web app, they don't even have to know it, Cenny.js will store data locally until a connection is established, and once one is, data will be synced up with the backend.

v2.3 Allows user passwords to be changed using user.password()
v2.3 Introduces the ability to call more than one instance of the .modified() method.
v2.3 Squashes heaps of bugs.
v2.3 Does even more.