Upgrading gunicorn to latest
change default settings for servers/assets paver tasks from "dev" to "devstack"
Update pavelib.rst and run_devstack.rst  for changes to default settings
Handle the indexerror exception on create_order
LMS-2646
Tooltip Acceptance Test
Studio: resolves layout issues with icons in system feedback UI
Use real templates in forum NewPostView tests
Add cohort selector tests in forum NewPostView
Include stack trace in Course Rerun errors; Log errors.
Use some real templates in forum list view tests

Unfortunately, one template (thread-list-template, defined in
_thread_list_template.html) still relies on complex Mako processing, so
that is still being mocked in the tests.
Fixes to improve help experience& correct HTML build errors
Revert "Merge pull request #4976 from edx/will/ecom-128"

This reverts commit a03baee25cc1758193460190e8b16990dcf20767, reversing
changes made to 12e2d442e9bc3b919d36a9bad7d82ac27f01dd5c.
Bok choy test for cohort group label in post.
Merge pull request #5081 from edx/ahodges/doc/help_fixes

Fixes to improve help experience& correct HTML build errors
Merge pull request #5070 from edx/reruns/error-handling

Course Rerun: include stack trace in errors and Log errors.
Add i18n extraction test
Improve thread list view tests

An obsolete test case was passing because the assertions were too weak,
so the assertions are improved and the test case removed.
Temporarily disable bulk operations b/c old mongo
does too much work on exit and doesn't handle nesting
Merge pull request #5082 from edx/hotfix/2014-09-04

Revert "Merge pull request #4976 from edx/will/ecom-128"
Make primary button focus state more pronounced