check for nil in database
more test for nil
more test for nil - it appears an empty string is not the same as nil
more test for nil - made a true NULL in the database
Fixed nil as empty string (in sqlite3) versus nil as a true NULL in the PostgreSQL database
Provided a list of CLAIMED sub-domains which act as a set of samples
Merge branch 'master' of heroku.com:enderstore

Conflicts:
	app/views/sites/index.html.erb