Set empty aws credentials to None.
sending template pdf with certificate request
fixing some typos
Teach OEE to consider old task_states when trying to recover from an xml mismatch
Centralize to a single GradingServiceError, so that it's caught when expected
Assign a score of 0 to tasks with no attempts
Use correct set of OpenEndedChild states
Merge pull request #1686 from cpennington/hotfix-max-empty-sequence

Assign a score of 0 to tasks with no attempts
Fixed password reset message

LMS-1507
Adding a YAML file to demonstrate how to include anonymized user IDs in Studio elements.
CSV Reporting of Shopping Cart Purchases, with tests

squashing to one commit to make cherry-picking by feature possible
Basic test fix
298.15 K is 25 C, not 0 (0 is defined to be at 273.15)

Signed-off-by:  <manuel.freire@fdi.ucm.es>
Recover from error loading forum thread list

When a user attempts to load more threads in the forum navigation
sidebar, reset the state of the world so the user can retry, and alert
the user appropriately.
Add focus trap on forum navigation thread loading

For accessibility purposes, it is bad to allow a user to initiate
loading of additional threads in the navigation sidebar and then shift
focus away from the sidebar, only to have focus snap back when the
additional threads are loaded. Now, we trap focus on the loading element
as recommended by our accessibility consultant.

JIRA: FOR-238
Change dummy locale to Esperanto
Fix for advanced settings failure
Studio: Review all panel help copy

Reviewed and updated all on-page panel help text in Studio for clarity,
consistency, and brevity.  Updated template HTML files to change text

STUD-924
Merge pull request #1704 from edx/release-hotfix-2013-11-15

merge 2013-11-15 hotfix branch to master
Merge pull request #1709 from edx/sarina/change-dummy-i18n-language

Change dummy locale to Esperanto