A few changes are showed below 2014/12/03.

1.Add new measure called LOE, which can objectively assess the naturalness preservation.
2.change the location of SimplestColorBalance function.
3.Change the MSRCP input parameter, so we can choose retinex scale.
The corresponding [wiki function](https://github.com/yunfuliu/pixkit/wiki/%5Bpixkit-image%5D-enhancement:-Image-contrast-enhancement#local--msrcp2014) has no the argument of the RetinexScales.