update with HSL, tint, and hue.

Hey everyone. Just made some changes. Added tint, HSL, Saturation, chroma, and Lightness(Tint).

It compiles however, because of the code difference from:
 http://stackoverflow.com/questions/4890373/detecting-thresholds-in-hsv-color-space-from-rgb-using-python-pil/4890878#4890878

min() and max() method are deprecated and replaced with amin() and amax(). 

More info on those method in NumPy reference 1.8.0 which I will be sending to both of you.
So, it compiles and outputs, but I'm not sure if it is accurate because difficulty of understanding the matrix transpose logic with R G B and differences with axis = 2 in the old code, and axis = 1 in the new code. 
I left comments with another hue procedure I found but, I think the current hue procedure with 6 if's is fine enough.
Anyway, that's all.