Time.precise

Using the existing time Fixtures in Rickshaw, fork off a Local and UTC "Precise" set

These sets work on the logic that each step in time should be a small step - e.g. instead of stepping from 15 minutes to 1 minute (1/15th the size), it steps from 15 min to 5 min to 1 min. 

This allows for more precise time axis labels (hence the branch name)