Disables the previous/next arrows on pdf books on the first/last pages respectively
Upgrading to 1.4.8
Added setting to disable find courses links
Renamed setting ENABLE_STUDENT_SELF_ENROLLMENT to COURSES_ARE_BROWSABLE
If setting COURSES_ARE_BROWSABLE is off return 404 on /courses
Removed hardcoded case for edge for /courses
Adding Pillow jpeg and tiff system libs
Fixed js coding style for pdf arrows toggle
Updated copy in dashboard
update discussion forum doc
First caption does not display outline on initial mouseover.
fix the bug that the first caption and the second one will become current at the same time when displaying right captions
fix the bug: when click a caption, the previous one will be in bold
fix the video caption lag issue
Add a management command to dump xml courses

This command loads the courses with the XMLModuleStore, and then exports
the fields contents as json in a diff-friendly way. This can then be
used to validate against regressions in the xml parsing code.
Make sure that we have the right set of fields available during xml parsing

We had a bug where mixins weren't being applied before `load_from_xml`
was called. This meant that not all of the fields were being loaded
correctly. To fix it, we used the mixoligist from the runtime to apply
the mixins earlier in the process. However, that caused the mixins to be
applied twice.

The included fixes to xblock resolved the multiply-applied mixins, and
the fixes to the parsing code make it simpler to understand, and add
some unit tests of the parsing to boot.
Merge pull request #1119 from cheng-shiwen/cheng-shiwen/master

caption display problem
Fix for PR 1119.

A Jasmine test was falling. It went unnoticed. The PR was merged. This
is a fix for it.
Display:none arrows in disabled state
Merge pull request #1154 from edx/valera/fix_failing_jasmine_test_return_correct_caption_index

Fix for PR 1119.