Readme tweaks.

Conflicts:
	README.md
KA Lite changes only:
Require pass zone_id to new facility form.
Hide zone_id in facility form display.
Delete facility_add view.
Browser test cruft and first pass at tests (not updated for control panel changes)
Changes to facility decorators and urls to account for removal of add_facility.
Next iteration of browser tests for control panel.
Move control panel browser tests into distributed tests.
Additions to central base template to ensure:
* Importing of purl.js.
* csrf for POST requests.
* var CURRENT_LANGUAGE is set.
Move general JS functions from distributed.js to khan-lite.js:
* handleSuccessAPI
* handleFailedAPI
* show_api_messages
Set default zone_fallbacks on:
* Facility
* FacilityUser
* FacilityGroup
Mostly working browser tests for control_panel.
TODO: Stop Selenium throwing a wobbly about the Modal.
All remaining instances of @require_admin that are in modules imported by centralserver now changed to @require_authorized_admin
Alert dismissal missing from test.
Make url nicknames unique, and use the "new facility" shortcut.
Fix import issue in test.
Renaming test file, attempting to fix broken selector.
Change imports from require_admin to require_authorized_admin
Couple small fixes
Browser test for moving a user between a group.
Fix import nit in facility views.
Assert zone for facility edit in central server.

Conflicts:
	ka-lite/kalite/facility/views.py
Change facility name in zone_management to link to facility edit view.

Conflicts:
	ka-lite/kalite/control_panel/templates/control_panel/zone_management.html