selecting urlconf conditionally; remove obsolte urls.py
full clean before signing, to make sure what we sign is the data that we'll keep.
central-server-side of redirect.  This also forces the sync to run, with no confusion to see that the device has not yet sent sync data to the central server.
Merge branch 'redirect_to_force_sync' of github.com:bcipolli/ka-lite into redirect_to_force_sync

Conflicts:
	kalite/securesync/views.py
Merge remote-tracking branch 'origin/redirect_to_force_sync' into hth
Merge remote-tracking branch 'origin/full_clean_before_sign' into hth
Merge remote-tracking branch 'origin/root_urlconf' into hth

Conflicts:
	kalite/settings.py
	kalite/urls.py