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.
doc-byte-sized-tasks: Add link to the byte-sized tasks in CONTRIBUTING

Thanks to @adampalay, we now have a list of byte-sized tasks, which are
useful for new contributors who want a gentle introduction to the
platform. This PR adds a link to the tasks tagged as byte-sized in the
public tracker.
Merge pull request #4965 from edx/split/lms_bugs

Split/lms bugs
Merge pull request #4972 from open-craft/doc-byte-sized-tasks

doc-byte-sized-tasks: Add link to the byte-sized tasks in CONTRIBUTING
djpyfs is installed app not middleware