put dgRMatrix and dgCMatrix in a single file
update header file
update constructor
use new API
add m_ and n_ arguments in constructor
update constructor for symmatrix
cosmetic
remove unnecessary headers
specify uplo for dsyMatrix
use new API
allow MatOp_dsyMatrix to use uplo field
add missing macros and definitions
avoid using "using" in header file
use "as" to replace R macros
move assignment to initialization list
more clear class structure
write templated code
simplify code for complex eigenvectors