Bump jasmine gem

*
https://github.com/pivotal/jasmine-gem/blob/master/release_notes/v2.0.3.
md
Get Select2 assets from gem

* Update to version 3.5.0 of Select 2
* Update Bootstrap 3 Select2 style overrides
* Apply site wide in preparation for user select improvements
  * Remove specific business support javascript includes and styles
Add form-control class to select2 element

* The select2 overrides are more specific and only apply fixes to
elements with a form-control class. Normally this is passed through to
the select2 widget but the business support script is generating a
hidden input
* Add form-control to the hidden input when it’s created
Fix alignment of checkboxes on business support

* Checkboxes were using a markup pattern from Bootstrap 2 that appears
to have broken with a Boostrap 3.2 upgrade
* Use the recommended pattern from
http://getbootstrap.com/css/#forms
Enhance user select drop down with select2

* Allow users to search the list of users instead of having to scroll
up and down
Bump admin gem to 1.1.7
Remove inline styles now provided by gem
Delete unused vendor assets

* Glyphicons and crown come from admin gem
* Select2 assets come from select gem
Remove old HTML5 shim

Shims are already provided via the admin gem
Merge pull request #278 from alphagov/improved-people-selector

Enhanced assignee selector