Add simple Angular template

Appears to work well so far.  Planning to put partials in static but
use django template to generate the angular root index.html
Add angular view, convert tabs to spaces
Working prototype of language family / classification picker
Converted selects to checkboxes for picking languages
Fix indentation
Clean up indentation again
First stab at find_societies API

Model is not populating correctly.  Need to fix that before trying this.
Add script to clear data.  Just languages so far
Changed find_societies API to GET
Implemented client-side find societies

Also changed society.iso_code to serialize the 3-letter code
Update selections on change subsubfamily
Include number selected/results next to title
Language families ui tweaks:

- Convert well to panel
- Add filter box
Redirect to search by default
Merge pull request #7 from NESCent/ui_prototype_angular

Language -> Society prototype using AngularJS