Allow sensitive information to be declared in env.

Allow OAuth keys/passwords/other sensitive info to be loaded through the
environment instead of requiring them in the file.
Change email settings names.

Change from "email-" to "smtp-". Add from-name, from-address, username,
host, use_ssl to values picked up from env.
version bumped 0.6.1
ignoring config file
updates for new config file
update for config setting rename
version bumped 0.6.2
removed old comment updated formatting
backbone views use listenTo, closes #32
removed extra .btn-group from .input-group-btn
version bumped 0.6.4
turned account email verification off by default