Travis: Also test on Ruby 2.0.0.

(cherry picked from commit 080b862aa221641c02fd7a6c79d4c6c7b2b977a9)
Fix that 'last login' didn't show year, only day and month. Closes #455.
Change 'From' address for notification emails to 'no-reply@oneclickorgs.com'.
Emails: Move organisation name to subject; in 'From' use OCO instead.
Add OCO contact link to footer of emails.
Merge branch 'gh339' into v1.x
Use new session cookie name, so upgrades to Rails >=3.1 don't error. Closes #456.

If you send a Rails <3.1 cookie to a Rails >=3.1 app, an
ArgumentError (dump format error) is raised. We can work around this
by changing our session cookie name, which stops the app from trying
to read the old cookie, and forces a new cookie to be created.
Travis: Also test on Ruby 2.1.0.
Update Bundler to 1.5.2.
Update childprocess.
When a Proposal is destroyed, destroy associated Votes. Closes #467.
Update mysql2.
Upgrade to Rails 3.2.17.
Prep for version 1.3.7.
Merge tag 'v1.3.7' into oneclickorgs-com

One Click Orgs 1.3.7