Merge pull request #1 from rterbush/master

Fix a deadly typo in here...
Fix specs and get travis setup.
Update README
Fix sample rake tasks.
Fix validation to allow blank values.
Fix editing of supplier info and begin allowing preferences.
Fix config reference.
Fix markup for new styles.
Allow editing of preferences within the admin.
Fix spec it text.
Better match preference styles.
Fix specs.
Prevent users from signing up more than once.