Add Jasmine tests for the payment/verification flow.
Merge pull request #6333 from edx/will/pay-and-verify-js-tests

Jasmine tests for verification / payment; small bugfixes
Filtering for assets table
SOL-20 adding type filter with some deafult values
SOL-20 basic testing
cleanup of asset urls on studio assets page

Conflicts:
	cms/templates/js/asset.underscore
SOL-20 add content type filters instead of extension, fix css issues, add filter text to pagination header
SOL-20 Fixing tests to include filter column
SOL-20 PEP8 fixes
SOL-20 Cleaning up code
SOL-87 add asset type filter unit test
SOL-20 Bug fix - current_page
SOL-20 stringify contentType before case change, to ensure it is string value
SOL-129 Remove Text category filter and add MS contentTypes
SOL-128 move and rename reset filter
SOL-127 Change Type filter title behaviour
Edits to the sidebar text

Update URL terminology, minor edits, add note
Cleaned up some warnings
SOL-20 Fix test, remove usage of Text category because it was replaced
Added some mime types to include gifs and tifs within image filter