Now takes an optional shader

reorganise the CIE-1931 and CIE-1964 tables.

a wavelength to saturated xyY function based on the standard observer
data.

white value in case we want to convert XYZ to L*a*b* with something
else than D65.

add XYZ to xyY conversion (which gives us a pretty accurate xy graph of
the sRGB gamut), and normalise XYZ using a D65 white point.

function for CIE L*a*b* values.

files on some Unix systems.

subtelties to avoid polluting Doxygen.

when a stream is not found in the vertex declaration at bind time.

Sorry for all the fine projects that use this shader !

a Set() method. Also, new HasKey() method.

need to make it O(logn) or even O(1) now.

namespaces between platforms.

I'm gonna commit this right now though I'm not really sure whether Visual
Studio will agree to build va_copy and others.

of unit tests for the String class.