More fixes and improvements in EFA code: 1) output summary of VSS analysis; 2) fix in PA() call (use "pairwise.complete.obs"); 3) use analytically determined # of factors instead of hard-coded values; 4) use correlation matrix instead of data frame for fa() and factanal() calls, some of which are enabled now; 5) disabled code for Schmid-Leiman transformation as well as FAs, using 'quartimin' rotation and ML approach.