+ Fix Bug in classification_w_kernel_appr.py: wrong index for classifiers.
+ Add option of doing zero centering for 20 news group after SVD.
+ Fix Bug in laprlsc.py: not adding identity regularization term and not computing labeled correctly.
Merge changes from https://github.com/queqichao/Research

Conflicts:
	rbf_kernel_approximation/classification_w_kernel_appr.py