Create README.md

README.md

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-OpticSim.jl is a [Julia](https://julialang.org/) package for geometric optics (ray tracing) simulation and optimization of complex optical systems developed by the Microsoft Research Interactive Media Group and the Microsoft Hardware Architecture Incubation Team (HART).
+# This rep is no longer being maintained. The latest version of OpticSim can be found at https://github.com/brianguenter/OpticSim.jl
 
-It is designed to allow optical engineers to create optical systems procedurally and then to simulate and optimize them. Unlike Zemax, Code V, or other interactive optical design systems OpticSim.jl has limited support for interactivity, primarily in the tools for visualizing optical systems.
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-A large variety of surface types are supported, and these can be composed into complex 3D objects through the use of constructive solid geometry (CSG). A substantial catalog of optical materials is provided through the GlassCat submodule.
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-This software provides extensive control over the modelling, simulation, visualization and optimization of optical systems. It is especially suited for designs that have a procedural architecture.
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-# Installation
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-Before you can use the software you will need to download glass files. See the documentation for detailed information about how to do this.
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-*Warning*: During installation OpticSim automatically downloads glass catalogs from a variety of public sources. The Schott website keeps moving their catalog on their website so our software can't find it to download. This caused all our examples to fail because they use Schott glasses. We have replaced the glasses in the examples with hard coded glass files so all examples now work (if they don't please file an issue). 
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-**If you want to use Schott glasses you will have to manually download and install the Schott catalog.**
 
 ## Contributing