changing kalite.adhocsync.com to kalite.learningequality.org. Note emails were changed to kalite@learningequality.org
changed wiki url from google sites to leq.org
make settings editable in the admin interface.  even if the db fails, should show behavior same as hard-coding values in settings.py.  NOTE: currently requires server restart to use settings changed in the admin interface
Merge branch 'develop' of github.com:bcipolli/ka-lite into develop

Conflicts:
	README.md
	kalite/central/models.py
	kalite/securesync/models.py
	kalite/settings.py
	kalite/templates/central/central_invite_email.txt
	kalite/templates/central/landing_page.html
	kalite/templates/central/org_invite_email.txt
	kalite/templates/registration/activation_email.txt
Merge branch 'develop' of github.com:bcipolli/ka-lite into develop