Added fluorescence assay fitting example (with no changes yet to use library).
Added fluorescence assay fitting example (with no changes yet to use library).

sonyahanson/assaytools,choderalab/assaytools,choderalab/assaytools,jchodera/assaytools,MehtapIsik/assaytools,jchodera/assaytools,sonyahanson/assaytools,MehtapIsik/assaytools