Gem upgrade.

Rails, its dependencies and most other gems upgraded.
Use config/secrets.yml
Use correct timezone.
Upgrade gems.

Missed to upgrade jbuilder and sass-rails first time.
Changes from railsdiff.org

http://railsdiff.org/diff/v4.0.2/v4.1.1/
Authentication hash fix.

It doesn't have indifferent access.
Merge branch 'rails_4.1'

This fixes #2