Cache databases to speed up acceptance tests
add aws.py hooks
Merge pull request #2379 from edx/chrisndodge/lock-accounts-after-failed-attempts

Add AWS.py configuration hooks to tie in login failure lockout parameters
Merge pull request #2311 from edx/will/cache-test-db-migrations

Cache databases to speed up acceptance tests
wire in env settings into aws.py
Fix pathological po growth
Added more descriptive page titles.
Merge pull request #2343 from edx/dstgermain/a11y-page-titles

Added more descriptive page titles.
Merge pull request #2385 from edx/ned/fix-pathological-po-growth

Fix pathological po growth
For capa if weight is 0 don't try to create Progress objects.
LMS-1494
Merge pull request #2275 from edx/usman/lms1494-progress-page-value-errors

For capa modules if weight is 0 don't try to create Progress objects.
Merge pull request #2384 from edx/chrisndodge/wire-in-aws-settings

wire in env settings into aws.py for session inactivity timeouts
Merge pull request #2137 from abdoosh00/feature/unicode

Unicode changes to support R to L script
css and html to support RTL
QRF settings check
fixes upon comments