updated README regarding Heroku's user-env-compile
force_ssl
clarify how to generate secret keys on README
configure Devise config.paranoid so that we don't admit when an email address is found
change 'Destroy' links to 'Delete'
fixed test to work with 'Delete' links
use username instead of email for login
undo commit 7731070aa940ab47c9319c9c35d1b2528d6d4b83: don't use username for login; continue using email
use haml-rails gem
fixed bug where a user could see other users' contacts when making a participant