Updates to facilitate program category casing changes

The LMS continues to expect lowercased category slugs, while the Studio program creator now uses correctly cased slugs. Programs should be updated before this is released. Part of ECOM-5018.

Release Candidate rc/2016-07-26

Discussion import/export fix (TNL-5001)

Observed Problems:
1. Discussion categories and targets were missing
2. When imported over existing course Discussion IDs have changed unexpectedly - all posts were missing

Solutions:
* Parsing legacy discussion OLX
* Do not force exporting discussion ID

Comment out flaky lettuce test  TNL-5051

Merge release to master

Update translations (autogenerated message)

Create Grades djangoapp

https://openedx.atlassian.net/browse/TNL-5008

Studio support level of components/xblocks

This reverts commit 4e65b1f1.

Handle unavailable course runs on the program detail page

TNL-4670

Includes a refactor of the program data extension utility. ECOM-4807.

Calculator wording and translation improvements

This reverts commit 5db58c00.

This reverts commit 5db58c00.

Convert ORA Due Dates

Release 2016-07-20 back to Master

Show user activation message if he has activation incomplete.

Skip flaky CMS.Course updates lettuce tests  TNL-5051

TNL-4906 Subsections now use radio buttons, to allow for "hide after due" as a
visibility option. Also, all tabs have been consolidated to "Basic" and
"Advanced", and visibility options have moved there.

Documentation links are updated to assist course authors with the new
visibility options. Tests have also been updated, and the changes suggested
in TNL-4951 are included.

Fix flaky asset page test

unawaz/ECOM-4787-account-settings-page-header

Allow program detail pages to function when catalog config is missing

Convert cms/coffee/src/main to js

Release Candidate rc/2016-07-19