Use opaque_keys w/ model vars not parsing of url
to generate url.
LMS-11209
JS regex's need to escape special chars
LMS-11260
Pin coffee-script version to 1.6.1.
Merge pull request #4969 from edx/benp/fix-js-tests

Pin coffee-script version to 1.6.1.

1.6.3 is causing some issues.
Merge pull request #4965 from edx/split/lms_bugs

Split/lms bugs
Remove client side parsing of module_id
in analytics dashboard.
LMS-11209