adjust implementation to reflect feedback from Calen. Also limit the jQuery selection to be within the metadata-edit region, just to avoid picking up other elements decorated with that attribute

Put SequenceDescriptor back as a subclass of MakeModuleDescriptor. THe previous change to have it derive from EditorDescriptor was not safe as EditorDescriptor presumes that there is a edit box in the JS save flows. So we need to edit get_context() on MakoModuleDescriptor to also pass along the metadata to the Mako rendering templates

Merge branch 'cdodge/meta-data-cms-editing' of github.com:MITx/mitx into cdodge/meta-data-cms-editing

Conflicts:
	cms/static/coffee/src/models/module.coffee

Fix JSON postback error where the content-type header line can contain more info than just the application/json descriptor. Now we just to a compare on the start of the header value.

Feature/bridger/course grading

removed line from optioninput field formatting

Better fix for trailing slash

New URLs require a trailing slash

Bug/tomg/collapsible hint

Feature/ibrahim/followed threads

Remove commented out block and pull some stuff into a function to load the first page of results for a thread query.

Conflicts:
	lms/djangoapps/django_comment_client/forum/views.py

Match custom static tabs after discussion URLs so that discussion can actually work.

Conflicts:
	lms/djangoapps/courseware/views.py

Feature/victor/static tabs

Fix JSON postback error where the content-type header line can contain more info than just the application/json descriptor. Now we just to a compare on the start of the header value.

adding pkg-config

fix ubuntu graphviz lib install

Properly puluralize comments tooltip and change "unread" to "new".