Reincarnating HR gauge.
Generating random HR zones.
Improved visuals of the HR gauge.
Fixed bug of initialized gauge directive throwing errors.
HR gauge generalized to an arbitrary workout gauge.
Added pace gauge.
Styling of gauge labels (used when gauge is larger than its max).
Displaying actual gauge labels (replacing mocks).
Little cleanup in the workouts HTML template.
Upgrading to Angular.js 1.2.3

Fixes #3.