wrap startup in $(document).ready, the usual way..
$(svg.node()).width() doesn't work in FF at least
gaussian rv implementation

10-20% slower than d3's in FF, Safari, and Chrome on OS X 10.6.8
Fix 'global' annotation for latest JSHint
rm motor display from heatmap card
WIP heatmap of positions
WIP implementing motion sampler
Simplify translation of (left, right)
Fix typo
updateHeatmap function
Modify updateHeatmap to work w/100 samples
Choose some initial parameters for motion sampler
Update "heatmap" w/ center circle always in front
"drunken robot" -- use sampler to move turtle
increase resolution of point display
Firefox insists height, width be attrs of <svg>
Try orienting sample display to robot heading