Readme for colour-1.1.0

I hope for this library to become the standard colour library for Haskell. Most software does not properly blend colours because they fail to gamma-correct the colours before blending. By using this library, Haskell programs dealing with colour blending will avoid this problem. This 1.0.0 release only contains the sRGB colour space. Support for other colour spaces is in development. I'm releasing this now because I believe sRGB support is all that is needed for many uses of this library. I hope that this sRGB interface will be stable. Bug reports and any patches are also welcome. Be warned, I haven't extensively tested this library yet. -- Russell O'Connor <roconnor@cs.ru.nl>