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
@kylerush yup, I just use it in multiple places so my attempt at being DRY.  Essentially it just injects an error message pertinent to the type of error