New timeline system - half working
Use variable size steps
Handle supersteps better
New way to draw multiple tickmark lines
Merge branch 'master' into new-timeline
Merge branch 'master' of github.com:SkyTruth/data-visualization-tools into new-timeline
Test for timeslider
Better continous zoom
Dynamic height
Added underlay
Window drag handles
Odd/even markers
Indentation
Merge branch 'master' into new-timeline

Conflicts:
	js/app/Timeline.js
Drop shadow, rounded corners, transparent tickmark borders
Labels
ZoomIn/Out buttons
Bugfix for pre-1970 dates
Don't split week tickmarks at month boundaries
Repeated labels for large tickmarks