add README entry with badges for process_simulation_output notebook; phase out nbviewer badges; fix BC mass fraction plot (#307)

Co-authored-by: Jeff Curtis <[email protected]>

Author: slayoo

README.md

@@ -42,6 +42,10 @@ import PyPartMC
 [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-atmos/PyPartMC/blob/main/examples/lognorm_ex.ipynb)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/open-atmos/PyPartMC.git/main?urlpath=lab/tree/examples/lognorm_ex.ipynb)
 [![Voila](https://img.shields.io/static/v1?label=Voil%C3%A0&logo=jupyter&color=teal&message=web+app)](https://mybinder.org/v2/gh/open-atmos/PyPartMC/main?urlpath=voila%2Frender%2Fexamples%2Flognorm_ex.ipynb)
+- Simulation output processing example (loading from netCDF files using PyPartMC):    
+[![View notebook](https://img.shields.io/static/v1?label=render%20on&logo=github&color=87ce3e&message=GitHub)](https://github.com/open-atmos/PySDM/blob/main/examples/process_simulation_output.ipynb)
+[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-atmos/PyPartMC/blob/main/examples/process_simulation_output.ipynb)
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/open-atmos/PyPartMC.git/main?urlpath=lab/tree/examples/process_simulation_output.ipynb)
 - Optical properties calculation using external Python package ([PyMieScatt](https://pymiescatt.readthedocs.io/en/latest/)):       
 [![View notebook](https://img.shields.io/static/v1?label=render%20on&logo=github&color=87ce3e&message=GitHub)](https://github.com/open-atmos/PySDM/blob/main/examples/mie_optical.ipynb)
 [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-atmos/PyPartMC/blob/main/examples/mie_optical.ipynb)