added different ordering for documents
filter documents in event page
Merge branch 'documents-ordered-by-created-at' into develop
Adds datepickers to documents search filters

* Uses jquery UI since that's already here, and non-terrible.
* Also changes the form to use bootstrap's suggested form <div>s
  because, although not semantic, they make styling a lot easier.
Adds date filtering to documents controller
Document date filter formats date correctly for controller
Document date filter is inclusive
Fixes document date filter selectors to match controller
Removes datepicker init JS

No need as automatically performed on elements with datepicker class
post-rebase fixes
Merge branch 'documents-filter-by-date' into develop
Fixes document attribute assignment in document batch upload

`.each` was incorrectly being used as if it was `.each_with_index`
Fixes my hasty fix for the document batch POST

Nested forms actually posts numerically indexed hashes, rather than
arrays. Tests updated to reflect this. Original code was working!
Adds number to Document model
Documents batch uploader accepts "number" for Documents
Adds number field to Document edit view
Renders document number in admin table