Cleaned TLAMisc::Mean()
Added TLAMisc::Std()
Added: TLinAlg::LinComb() //z := p * X(:,ColId) + q * y
Added: TJsLinAlg::test() for testing TLAMisc::Std()
Added: TLinAlg::LinComb --> if (Dim == 1) {z := p * X(:,ColId) + q * y} else if (Dim == 2) {z := p * X(:,RowId) + q * y}
Finished: TLAMisc::Std --> With all optional arguments as in Matlab.
Added: TLAMisc::ZScore to linalg.cpp
Added: la.zscore() tp qminer/qminer_js.cpp