Check if airbrake is available
Merge pull request #5 from psy-q/master

Run CI also on Ruby 2.1.1.
Merge pull request #6 from psy-q/master

Keyboard shortcut 'a' for 'Add entry' on timesheet.
Make it beautiful
Merge pull request #4 from ninech/3-fix-airbrake-notify

Check if airbrake is available