Update Disclaimer

Author: firefly-cpp

README.md

@@ -43,3 +43,7 @@ I. Fister Jr.,  X.-S. Yang,  I. Fister, J. Brest. [Memetic firefly algorithm for
 Jozef Stefan Institute, Ljubljana, Slovenia, 2012
 
 I. Fister, I. Fister Jr.,  X.-S. Yang, J. Brest. [A comprehensive review of firefly algorithms](http://www.iztok-jr-fister.eu/static/publications/23.pdf). Swarm and Evolutionary Computation 13 (2013): 34-46.
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+## Disclaimer
+
+This framework is provided as-is, and there are no guarantees that it fits your purposes or that it is bug-free. Use it at your own risk!