Base64 function

Hi,
Just having a look, thanks for providing the source to this.

Just one question - did you really need to reimplement base64?

e.g.
https://github.com/cornflourblue/angular-authentication-example/blob/master/modules/authentication/services.js#L55

atob / btoa functions
http://www.w3schools.com/jsref/met_win_atob.asp
http://www.w3schools.com/jsref/met_win_btoa.asp
