Changeset [3a8803b935ebfc4b1ce8d3e36d4d555b6f64b5a1] by Erik Derohanian

Begin adding vertical slider

references #32
the html layout is strange, I can't figure out how to line up the mouse with the line. gridtrack going way off-screen is confusing.
Will continue after talking to rbuels. Editing src/JBrowse/View/TrackList/Simple.js:70 so that it's 160px instead of 10em may help.
https://github.com/GMOD/jbrowse/commit/3a8803b935ebfc4b1ce8d3e36d4d...