Update README.md

README.md

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 Building this project is not difficult, but the setup prior is. You must have
 OpenCL and SFML development libraries insalled. You must also have OpenCL
-compatible hardware to run it on. 
+compatible hardware to run it on. The Cmake file should take care of most of
+the configuration, but you have to point it to your SFML root directory before
+it will generate. Working in VS2015, I don't have linux compatible hardware, but
+it does compile and run on the backup renderer albiet horrendously slowly. The 
+macOS build was working around commit 50, but I no longer have access to a mac.
 
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