ECOM-369 Added initial Backbone code which allows a user to login to lms
ECOM-369 added registration view and front end validation
Added password reset view and started basic styling
ECOM-369 added forgot password flow plugged in to Renzo's API
ECOM-369 uncommented model sync trigger
Merge pull request #5647 from edx/alasdair/combine-reg-login-form

Alasdair/combine reg login form