Update README.

README.md

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 # jurassic-scatter
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 The JUelich RApid Spectral SImulation Code with scattering is based on JURASSIC 
 (https://github.com/slcs-jsc/jurassic), but was a bit reorganized to include modules 
 that allow simulations with scattering on aerosol and cloud particles.
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 ![GitHub](https://img.shields.io/github/license/slcs-jsc/jurassic-scatter.svg)
 
 ## Short Description
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 The Juelich Rapid Spectral Simulation Code (JURASSIC) is a fast radiative transfer
 model for the mid-infrared spectral region (Hoffmann, 2006). It was used in several
 studies for the infrared limb sounder Michelson Interferometer for Passive Atmospheric