Remove the collection specific MODS datastream we had before.  Replace with a general MODS datastream.  Updated MODS datastream to reflect minimal viable information suggestions gleaned during that meeting.
Mods datastream is now responsible for properly setting keywords, form also now supports adding keywords.  Fixed a bug that was causing rightsMetadata to ignore the first entry in the form passed to it.
Added bootstrap datepicker, which will be used for setting an issuance date for new collections.  Datastream now enforces that setting first/last name requires both to be non blank.
Merge branch 'feature/mods_update' into feature/collections

The mods update branch was explicitly for updating the terminology of a MODS record.  Now that this is complete work integrating those changes into how collections are handled should continue on the feature/collections branch.