Allow viewing survey report for weeks in the past
OPM - changes in filters
renamed Mixin class
added bolding in headers
Convert forms to ajax
converted account_number to nondecimal in old snapshots
Remove unnecessary hash initialization
Remove unnecessary ajaxForm calls
Validate date in form API
Raise ESError when bad query given
Remove None checks for run_query
Add DateTimeError
Check optional time parameter
remove debug stuff
Make filter choose Tuesdays
make some formatting and organizational improvemnts to .travis.yml
(travis) be more explicit about blank couchdb vars
memoize several key lookups in stock status maps

drops about 15 seconds off load times in chai

some bits of cleanup in here too
Merge pull request #4016 from dimagi/fri-survey-report-date

Allow viewing past snapshots of the survey responses report
call process_cases directly instead of through a signal