Adding XSLT files as a submodule.

This is to better manage the state of these files vis-a-vis
the tracking system.  Checking these in as submodules ensures we
have some way of tracking the state of these files as they change
over time.  Be aware that several of these files are stored in Fedora
as well, for on-the-fly transformations.  Always check the MD5 for
those objects' XSLT datastreams against the versions here.
Numerous changes for facilitate work in dev.

Adding methods and some UI feedback to make working
in development environments easier.  Using data from production,
the dev system often has situations where things are not in the
Fedora/Solr datastores used by dev, so methods have been added to report
this.
updated config for Dev env.
Merge branch 'development' of https://github.com/uvalib-dcs/tracksys into development

Conflicts resolved:
	.gitignore
Working version of Admin page and Hydra.solr

More testing to do, but this version seems to have everything
we need.
Upgrading to 3.2.16; adding IndexDestinations model
Adding nil guard on Units admin page

Odd case: master_files.last returns nil, and really should not.
See Unit 29644 for an example.
Adding processor method and cleaning up admin page
Merge branch 'development' into production
Correcting two stylesheets with syntax errors.

Updating submodule accordingly.  FP2 has been updated.