playing more with neutron activation calculator (now broken)

adding ajax and cgi-bin
update cgi
report material along with activation result; allow cutoff
manage rest times correctly in cgi
default extra time to 5 days
remove debug statement from activation backend
add units to table
add neutron scattering output
add error handling
html cleanup
add cutoff as url parameter
make cutoff and abundance into page parameters
better default cutoff; put results in separate divs
calculate time to reach a particular activation level
show multiple 1/e lengths
better display and error handling
enable php
rename daughter to product
improve disclaimer visibility; streamline input form
use cgi-bin rather than cgibin