i18n: submit buttons at dashboard
i18n: staff/student toggle link
i18n: problem submit buttons.
Improve accessibility for forums post toolbar

Mark toolbar and buttons with appropriate ARIA roles, add them to the
tab order, and make the titles more screen-reader friendly.
Consider redirect code as succcesful
Properly handle error responses
Prompt before leaving page
Added script to install acceptance test requirements;
updated Vagrantfile

Added dbus-x11 requirement (for FF); increased VM memory

Updated ChromeDriver version
Don't try to purchase the same order twice
Add ability to run against generic selenium grid
Install prereqs before collecting assets
Merge pull request #1044 from edx/zoldak/acceptance-grid

Add ability to run against generic selenium grid
Catch IOError and ignore if OS X companion file
Remove useless try-except clause
don't remove comments from xml module
Quiet the output of passing acceptance tests
Speed up lms login
Adding support for ICE track changes to calibration UI improvements
Merge pull request #1042 from edx/giulio/ICE-calibration

Adding support for ICE track changes to calibration UI improvements
Merge pull request #1046 from edx/zoldak/quiet-fast-acceptance

Zoldak/quiet fast acceptance