quieted more g++ warnings of the form: warning: typedef XXX locally defined but not used [-Wunused-local-typedefs]
Add lapack interface to JacobiSVD and BDCSVD
Fix JacobiSVD wrt undeR/overflow by doing scaling prior to QR preconditioning
Fix D&C SVD wrt zero matrices
Ignore automalically imported lapack source files
Fix SparseLU::absDeterminant and add respective unit test
merge
Fix SparseQR::rank for a completely empty matrix.