Began refactoring REST services UI

- Created subdirectory for REST-related templates.
- Split rest-services.html into rest-services/index.html,
  rest-services/new.html, and rest-services/settings-view.html.
- Modified view tab to read "Settings".
- Modified view tab contents to be an accordion, allowing the user to drill down
  into the specific settings they want to introspect. This is done using the
  "collapse" directives.
Implemented "edit" view

- Uses collapse panes and list groups, to mimic view.
- Moved tab markup into the parent view.
Initial refactor of Fields edit form

- Help button is btn-info now
- Create button is btn-primary now
- Changed checkbox for "Required" to a toggleable button
    - TODO This should technically be a toggle or switch; unfortunately, not
      finding anything in angular-ui-bootstrap or bootstrap to do that, and
      bootstrap-switch could not work due to the fact that jQuery is unable to
      work with ng-model properly.
Add MIME type to JS
Refactored "filters" portion of Fields edit screen

- Added hover behaviors (only show "New Filter" when hovering over
  filters, only show "Add Option" and "Remove Option" buttons when
  hovering over option).
- Filters section is now collapsible.
- New style for Filter panels ('panel-blank', which has an uncolored
  header).
- Button colors and locations are now consistent.