Upgrade Rails to newest following security notice.
Bumped Rails version.
Move to .ruby-version and .ruby-gemset files and bump ruby version to 1.9.3p392.
Removed anaesthesia and pacu timings from subject records.
Upgraded to Rails 4.1 on Ruby 2.1.
Merge branch 'feature/remove-operative-times' into develop
Added duration fields to model and views.
Added update date to footer.
Merge branch 'release/2014010801'