Internal/External Studio file URLs

- Changed link URL of file name to use public/LMS url
- Added toggle link to display all public URLs for instructor convenience
The correct LTI keyword is "roles", not "role"

This is only a correction in the documentation
add new feature to make sure we aren't writing PII into the application logs. So far we're aware of doing so regarding Auth use-cases
Assets Page Template Update

For embed vs. external URLs

STUD-1338
removed dup'd paragraph
Fix start-time functionality in the video player.

When there is a start-time:

Initially, the video starts playing from the start-time.
Whenever the player resets for any reason (such as reaching
the end of the video), it will reset to start-time instead of 00:00:00.
It should not be the case that any time the user presses play, it
start playing from start-time.

BLD-659.
Addressing review comments from jmclaus.
Addressing review comments from jmclaus.
Add test for external_url being passed to assets page.
Merge pull request #2649 from edx-solutions/AddAuthor

Adding Marty as an author
Merge pull request #2579 from edx/giulio/studio-file-urls

Internal/External Studio file URLs
Merge pull request #2708 from pdehaye/patch-1

The correct LTI keyword is "roles", not "role"
Tweaks course update html to avoid using list tags inappropriately.
LMS-1724
Improve UX of pinning feature

Students no longer see a tooltip nor any button affordance (i.e. cursor
and color change on hover/focus) on the pinning feature. For moderators,
the tooltip is now correct when a thread is pinned, the button is
accessible for keyboard-only users and screen readers, and an error
dialog now appears if an error occurs in attempting to pin/unpin.

JIRA: FOR-192
Merge pull request #2734 from edx/dcs/a11y-course-update-delist

Tweaks course update html to avoid using list tags inappropriately.
LMS-1724
Merge pull request #2739 from edx/release

Release
Merge pull request #2733 from edx/gprice/forum-pinning-ux

Improve UX of pinning feature
Merge pull request #2668 from edx/cdodge/no-pii-in-logs

add new feature to make sure we aren't writing PII into the application ...
Release Notes for 2-26-14

DOC-36
Merge pull request #2718 from edx/markhoeber/documentation/release-notes-2-25-14

Release Notes for 2-26-14