Removed grading and drag'n'drop
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
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
Merge pull request #4974 from edx/bug/djpyfs

Bug/djpyfs
Merge pull request #4935 from edx/ahodges/doc/DOC914

Removed grading and drag'n'drop
Replace reference to Google OpenSans with edX-hosted OpenSans
Addressed comments.
Fixed path to font files.
Use Bourbon mixin utility instead.
Ordered font declarations by increasing font-weight
Fixed wrong path to one font file.
Removed reference to fonts.gstatic.com that was left in non SASS-generated CSS file.