i18n: Make XBlock buttons & components have localizable display names

i18n: Fix an i18n string extraction problem in 02_html5_video.js

Bok-Choy Video Time Tests

Fix youtube regular expression in video player editor

Replace a string concation to a single string to prevent the partial extraction of the string.

1. Current code uses type name as the display names for XBlock buttons, so the name of these five buttons can't be localized. This fix contains code that adds a 'display_name' field for the buttons, and makes their names localizable.
2. The display names of components in advanced, html and problem types can be localized now.

i18n: More extractable & localizable strings in xmodules

Video: refactor volume control.

Fix quality violations from opaque-keys

Add the needed wait for ajax statements to checklist acceptance test methods

Add 'roles' endpoint to user_api

ORA2 release-2014-05-23T16.59

Hide beta dash Analytics tab behind feature flag

Expose a new endpoint to query a list of users based on a
role name (Moderator, Student, etc.) and a course_id.

This will initially be used by the notifier to send daily digest
messages to forum moderators.

Installing Image Annotation Tool for Upcoming June 2014 Course

ENABLE_INSTRUCTOR_ANALYTICS flag is present to conditionally hide data
dependent on external analytics server installation

Ahodges/documentation/doc394

Changes requested in PR

- Added component to view

- Added correct images for OSD

- Fixed path to codemirror

- Tinymce fullscreen works now

- Pep8/Pylint Fixes

- Default image changed and added call to super

Small plugin fixes

Wait for ajax to complete when editing components in Studio acceptance tests

(WIP) Make course ids and Locations/Locators opaque to LMS/Studio

Add page num to forum search tracking log events

Fixed typo in Studio Home Page panel help text

Skip intermittently failing js video tests