Added a LocalTime fixtures to use default timezone. Added an option into Graph.Axis.Time to allow fixture to be specified.
Used JavaScript time to find the "days" ceiling.
Fixed date rollup problem.
Made hover to show local time.
Fixed formatDate and formatTime.
Merge branch 'shutterstock-issue-140-timezone' of https://github.com/RealSelf/rickshaw into RealSelf-shutterstock-issue-140-timezone

Conflicts:
	src/js/Rickshaw.Graph.Axis.Time.js
change name from LocalTime to Time.Local
use shorter time formats for local time display