Dfoxpowell/modal oform signin signup

- Implement oform on signup/signin modals
- move oform globals to global js because it was not getting included before it was called in modal component JS --- Need Browserify!!!
- log response from signup to segment
- styling for error classes in helpers and modal scss
ok yeah i think this is not necessary because it only will get executed on /signin which is not part of the new marketing website. let's take it out for now and we'll revisit if we ever decide to pull /signin into the marketing website.