GCI-36: Update forgot password screen

This is to implement [GCI-36](https://issues.openmrs.org/browse/GCI-36) ([Melange task](http://www.google-melange.com/gci/task/view/google/gci2014/4599021821755392)). Changes:

 - Updated reset password form with design from https://wiki.openmrs.org/display/projects/ID+Dashboard+Wireframes
 - All pages now have the "sidebar" below the main content