Set configurable default from address

This allows a configurable default from email address to be set
for for ActionMailer mailers.
CCLA table expanding fix

This fixes an issue where when you click view contributors on the CCLA list
it would jump to the top of the page as it's an anchor link. This just
adds preventDefault to tame this behavior. It also changes the binding class
for the click event so it doesn't conflict with the Foundation expand class.
Add footer.
Update dependencies.

Rails 4.0.3 is out. Wahoo.
Clarify commit author import collaborators

These specs now document which messages we expect to send to
collaborators. They're also more protected from changes to the internals
of the collaborators.
adds rubocop gem