Update libreg/src/sim.c to protect VS sim gain from NaN if denominator is zero
Update inc/flot/flot_part1.htm to use Modernizr.touch to only load flot.resize plug-in on non-touch devices
Update inc/flot/flot_part3.htm to improve Help pop-up text
Update inc/flot/flot_part4.htm to delay call to OnLoad() by 20ms to allow browsers to catch-up