Add jasmine via official jasmine gem

* Configure to avoid default phantomjs download
Include jasmine:ci in default task

* Run javascript tests by default
Remove flash notice 'slide' animation

* There are no `flash-notice`s in the application
Include govuk-admin-template as jasmine src file

* Required for bootstrap and query libraries to be present
Move business support check all js into module

* Make a generic and re-usable “check all checkboxes” module, rather
than javascript specific to business support
* Make use of the admin template’s js module system
* Add first jasmine spec
Clean up business support checkbox styles

* The checkboxes had a lot of custom CSS that was reproducing the
default bootstrap 3 styles, remove that CSS and use class helpers where
styling differs
* Add spacing between ‘All’ checkbox and the others (which was
previously intended but not working)
Merge pull request #211 from alphagov/jasmine-js-tests

Move business support javascript into tested module