When a url contains a query parameter it gets incorrectly parsed
when replacing the /static portion.

This fix handles urls with query parameters.

Cleaned up files with muliline imports

Cleaned up files that do not use these imports

Misread comment

fix (again) static_replace to work with static_asset_path

WIP: added a get_modulestore_type. Added some unit tests. changed over the isinstance() with respect to modulestores to use this get_modulestore_type()

- regexp was too complicated, didn't work

- needed for GWT'ed modules that rely on the filename to find dependencies

Make local dev work by trying checking staticfiles_storage for both the course_prefixed and non-course_prefixed urls