pearson registration - revised contact calls to action and order in status section, edited flash message copy/styling, added in strawman state for disabled form/closed registration state of form, added in strawman state for demographics rejected flash message, revised accomodations text labe and isntructions

revised rejected state error message content, markup, and styling on registration's right hand side status area

pearson_make_tc_user: add support for incremental changes, and changes to 'internal' fields for debugging.

pearson registration - changed accepted classes, content, and styling to use the term process instead

pearson registration - revised UI states for reg form, simplified markup for form fields, synched button styles/text b/t registration form and dashboard

switch back to returning json to test_center_register template, and enable jquery handling in template.

fix migrations, removing one field and making another nullable.  Update registration page to allow for editing only demographics.