Added new kernels to documentation

Histogram intersection kernel (accessible by using SVM::INTER in CV namespace as kernel_type)
Exponetial chi2 kernel (accessible by using SVM::CHI2 in CV namespace as kernel_type)

Formulars:
Exp-CHI2
k(x,y) = exp(-gamma * CHI2(x,y))
CHI2(x,y) = 1- 2* SUM_i[(xi-yi)²/(xi+yi)]

Intersec
k(x,y) = SUM_i[min(xi,yi)]

OpenCV build information output to logcat added to OpenCV initialization code;
Documenation for cv::getBuildInformation() added.

DeleteLocalRef calls for jclass objects added.

This reverts commit 4abf0b31.

Changes are reverted because they break build of proxy dlls on Windows

In previous version getWidth() and getHeight() values were used instead method parameters.

(Also fix spelling in comment)