switched bookmarklet to a proper django form
fixed required field on the bookmarklet form
location field was accidentally marked as a required field. changed
back to an optional field to fix broken test cases.
Dropped static bookmarklet javascript as we're going to use a template to generate per-user bookmarklets.  See bookmarklet/templates/bookmarklet.html
* moved bookmarklet URL from /api/add to /api/form for clarity
* cleaned up /api/form to use the bookmarklet form object to decode the GET parameters in a sensible way
dropped name, profession, and remember field from bookmarklet as per #108
minor flake8 cleanups
Merge pull request #112 from OAButton/features/bookmarklet_as_form

Features/bookmarklet as form