Allow extra fields returned from comments service

Release notes date fix

Release Notes for 5-6-14

Previously, an error was raised if the comments service returned data
including an unexpected field, which unnecessarily complicated the
release path for new features, since the list of allowed fields would
need to be modified before cs_comments_service could be modified, and
only then could edx-platform take advantage of the new CS feature. We
still log a warning if an unexpected field is returned, so we will
still be able to tell if the CS returns a corrupt response.

JIRA: FOR-180

WIP Switch default instructor dashboard to new dash

LMS-1296

Release for May 12, 2014

Stylize warning banners; more UI touches for the intructor dash:
clean up nav structure, compact header so content is higher on the page

LMS-1296

LMS-1296

Fix acceptance and unit tests

LMS-1296

LMS-1296

Notification banner to default dash to announce the change

Warning banner on legacy instruction dashboard to explain it has been deprecated

LMS-1296

LMS-1296

Video: Fix acceptance tests.

Anton/fix video in ff

Modified ssl certificate authentication to handle next redirection

Remove unicode character inserted into video_xfields

allow capa problems access to anonymous_student_id

Reconnecting Token Generator for Annotation Tool

Improve the translatability of Studio's paging header

Adding additonal path to search for git information on sysadmin dashboard

Clarify strings for i18n

Fixes LMS-1740 by activating the zooming diagram with the spacebar.

Makes small changes in lms and cms both so that user's go to the
original page they intended to if they weren't already logged in

Add more links in the PR guidelines.

add problem reset link to staff debug page

Sylvia/docs/doc 359

Sylvia/docs/doc 206

Note about course staff and discussion admin roles