ECOM-531 Styling the forms
ECOM-531 Styling the buttons
ECOM-531 updating grid column counts in media queries and added some more classes to style against instead of elements
ECOM-531 tweaking margins
Merge pull request #5681 from edx/alasdair/logistration-styling

Alasdair/logistration styling - merge approved by Will
WIP: Add JS tests of login and register page
Set up for testing login, register, and password reset views