Fix typo in transcripts_utils.
Remove coursename from page H1, and slightly improve sequence navigation
Adding ability to give an attribute callback for CAS
Certificates: Additional flags for regenerate_user

* -G allows explicit setting of grade condition (e.g., a string such as
  'Distinction', 'Pass', 'F', 'B') for the certificate, regardless of
  grader output for the user.
* -T allows explicit request of a particular certificate template to be
  applied to a given user's certificate regeneration, i.e.:
    -T doctor_distinction.pdf
  to generate a certificate of distinction for doctors.
added loading pattern to studio
Fix incorrect parse of url in video_module.py

Sometimes the video url may look like 'http://abc.com/path/video.mp4?xxxx'.
(For example, the Windows Azure's media service will offer such type of url.)
The original code in video_module.py will produce 'mp4?xxxx' instead of 'mp4'
as the extension of a filename for such type of url, and therefore the video
will be non-playable. The fix here uses the built-in urlparse module to retrive
only the path component from a url and therefore the extension 'mp4' will be
correctly fetched.
Update XBlock to latest version
Puts module.render() in try statements.

LMS-1192
resolves IE9 display issue where courseware content layout/background display was broken
UX-53
BLD-581: add highlighting of entire field on focus.
Fixed HTML tab in bulk email feature on firefox.
LMS-2275
Answer checks should offer feedback to assistive tech. This commit adds
a page level javascript SR object to enable reading of alert messages.
LMS-2158
Fix pylint disable pragmas that were pep8 violations
Merge pull request #2595 from edx/dcs/a11y-expose-errors-sq

Answer checks should offer feedback to assistive tech. This commit adds
Merge pull request #2967 from edx/waheed/lms2275-fix-html-tab-in-bulk-email-feature

Fixed HTML tab in bulk email feature on firefox.
Merge pull request #2996 from edx/anton/add-selecton-on-focus-for-time-editors

Video: Add highlighting of start/end time field when clicking into it.
Merge pull request #2989 from edx/talbs/fix-lms-contentbackground

FIX - LMS: Courseware Content Background Color/Height in IE
BDL-810: Fix image mapped inputs.
Merge pull request #2997 from edx/zoldak/fix-pragma-pep8

Fix pylint disable pragmas that were pep8 violations
Merge pull request #2904 from edx/dcs/a11y-header

Remove course name from page H1, and slightly improve sequence navigation