Beginning to improve Add Property

Checkpoint.  Just starting, but making progress.

Tried to add Chosen, but found that it has compatibility issues with
Bootstrap, so put that on pause for now.
Separate the local properties above the System ones

Checkpoint
Playing with layout a little

Checkpoint.
We now display info about the selected Property

Checkpoint.  Added the getPropertyDisplay entry point, which I expect
will be awfully useful in the long run: an AJAX call to fetch *any*
property value, in rendered form.
The new Add Property mechanism is working

Not done with all the work yet, but the key enhancement is in.
Beginning of Create New Property

Checkpoint.

Also removed the old, clunkier mechanism for adding an existing
property.

Also fixed some rendering issues.
Release 0.3.17