Update README.md

README.md

 # CConfigSpace
 
+CConfigSpace (CCS) aims at providing interoperability between autotuning
+frameworks and applications with auto-tuning needs. It does so by providing a C
+interface to describe autotuning problems and autotuners.
+
+CCS has been greatly inspired by https://github.com/automl/ConfigSpace, and was
+first thought as a drop in replacement for the engine of ConfigSpace.
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