code to make finely binned profiles that display as color images
added code to look at how volume is distributed too
added code so that the values are normalized by the total in that given r annulus
code to identify which cells would be star forming. I dont think Im doing the density cut right yet thought
added lines to make plots with total gas mass
 I dont think Ive changed anything...
added code to set limit on colorbar so you can see the spread in percentages at the low end. especially useful since the high end is very few cells. also added code that plots solid line at metallicity that would be predicted by a semi-analytic model, specifically M_metal/M_gas