January 31, 2014

1. allow spiral pattern to have an inner and outer radius
2. code can now read in a density array (e.g., from a hydro simulation, reformatted for 
polar-spherical grid).See instructions file
3. the 2 disks can have different inner and outer radii.

August 2, 2013

in grouping outgoing photons into their origin of emission (stellar, disk, envelope), I forgot
to include the PAH emission from the disk.  It was being lumped in with envelope.  This doesn't affect
anything but the plots showing origin of emission (plotsedo in the IDL directory).

July 2013

release version