Removed 'A_init' from PrincipleComponentAnalysisMtj.java. The matrix A is now directly populated in the loop.
Modified PCA computation. Improved PrincipleComponentAnalysisMtj.java but ignoring the 'Y' matrix as it is not necessary if the projections of *individual* points are computed. Computing the projection of *all* points via matrix-matrix multiplication with 'V_red' entails more memory usage. PCA library Mtj is now again default.