move bootstrap to vendor directory

github was thinking mortimer was a CSS library!
fix server restarts showing as negative rates

Original idea was to just filter negative values out of rates, but in
case there are places where we actually want the rates of things that
vary both in directions (mem_used and friends, perhaps?) what I actually
do is just filter points where the "uptime" stat's rate would be
negative.
better selection of line colors
fix position of loading and error indicators
fix error when only active stat is toggled off
automatically select first bucket and file when loaded
total hiding of left side drawer
keyboard shortcuts

* / - focus search field, opening drawer if closed
* j, k - choose next/previous stat
* cmd+j, cmd+k - choose next/previous file
* shift+j, shift+k - choose next/previous bucket
* enter - chart stat at cursor
* cmd+enter - add stat at cursor to chart
* r - chart rate of stat at cursor
* cmd+r - add rate of stat under at to chart
* >, < - open or close drawer
* q - toggle multi-window sync push from this window
* gg - move cursor to top of stat list