add more info to readme

README.md

@@ -4,4 +4,7 @@
 [![Aqua QA](https://raw.githubusercontent.com/JuliaTesting/Aqua.jl/master/badge.svg)](https://github.com/JuliaTesting/Aqua.jl)
 
 # StarFormationHistories.jl
-Modelling and fitting astrophysical star formation histories.
+This package implements methods for modelling observed color-magnitude diagrams (CMDs) and using them to fit astrophysical star formation histories (SFHs). A paper describing the implemented methodologies is currently in preparation. This package also provides utilities for simulating CMDs given input SFHs and photometric error and completeness functions, which can be useful for planning observations and writing proposals. Please see our documentation (linked in the badge above) for more information. A rendered Jupyter notebook with example usage of this package is available [here](https://nbviewer.org/github/cgarling/StarFormationHistories.jl/blob/main/examples/fitting1.ipynb). 
+
+## Acknowledgements
+Support for this work was provided by the Owens Family Foundation and by NASA through grant HST-AR-17560 from the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS5-26555.