Add some optional policies around password resets, such as password reuse, forced password resets, allowed frequency of password resets
password history: just limit the result set range to simplify iteration logic
remove double icons in the wiki sidebar
switching more wiki icons to use the right format
make beta dash compute module_state_key like legacy dash (LMS-2491)
add failing tests
Upgrade django_nose to 1.2
Test TemplateLookup dirs are not cleared during lms startup.

LMS-2498
make sure new lms/tests.py file is run
Merge pull request #3205 from edx/usman/lms2498-mako-template-tests

Test that TemplateLookup dirs are not cleared during lms startup
Merge pull request #3187 from edx/adam/fix-alter-xblock-student-state

Adam/fix alter xblock student state
BLD-958: Force video player in flash mode.
Merge pull request #3195 from edx/anton/force-flash

Force video player in flash mode.
Merge pull request #3204 from edx/db/upgrade-django-nose

Upgrade django_nose to 1.2
Fix the pointer to the contentstore in the bok-choy settings
Added "Edit in CMS" links throughout courseware
Merge pull request #3184 from edx/frances/fix/lms-wiki-icons

Remove double icons on LMS wiki page
Merge pull request #2552 from edx/giulio/edit-in-cms-links

Add "View in Studio" links throughout LMS
Stray space made html file formatting incorrect
Merge pull request #2781 from edx/cdodge/password-history-enforcements

Add some optional policies around password resets, such as password reus...