Create REFERENCES.md

Author: castarco

REFERENCES.md

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+## References
+
+This library is inspired by many other projects and based on many reference books.
+
+### Software projects
+
+* .NET/Mono:
+  * [THEjoezack/ColorMine](https://github.com/THEjoezack/ColorMine/)
+  * [tompazourek/Colourful](https://github.com/tompazourek/Colourful)
+* Python:
+  * [Colour Science for Python](http://colour-science.org/index.php): This is an incredible project that has many repositories in Github, not only with Python code, but also with Matlab source code and other resources.
+  * [fish2000/ColorPy](https://github.com/fish2000/ColorPy)
+
+### Online resources
+ * [1997 - Color FAQ - Charles Poynton](http://www.poynton.com/PDFs/ColorFAQ.pdf)
+ * [1998 - Gamma FAQ - Charles Poynton](http://www.poynton.com/PDFs/GammaFAQ.pdf)
+ * [1998 - *Colour Space Conversions* - Adrian Ford, Alan Roberts](http://www.poynton.com/PDFs/coloureq.pdf)
+
+### Books
+
+* *2005* - *Colorimetry: Fundamentals and Applications* - Noboru Ohta, Alan R. Robertson .
+* *2007* - *Colorimetry: Understanding the CIE system* - János Schanda .