add support for time filter
change function name for new filter
fix notes on form_widget_args
use bootstrap-daterangepicker as for timepicker, datetimepicker, and datepicker
change momentjs version for bootstrap2
fixes issue #621 and #603 for bootstrap2
Travis shall use WTForms >= 2
Add missing meta for InlineFieldList
Travis build matrix for WTF 1&2
Support WTF 1&2
Merge pull request #691 from arsgeografica/wtf2

WForms2 compatibility – resumed
Merge pull request #688 from pawl/daterangepicker

Use bootstrap-daterangepicker instead of bootstrap-datetimepicker and add Time filter support
Allow validators on sqla inline relations

* Added an ItemsRequired validator
* Make inline relation check form_args
* Don't apply Optional validator if Required validator was specified
* Test case: many emails for each user, but each user must have
  at least one email