* remove set(), revert to old behavior where = resizes

* try to be clever in matrix ctors and operator=: be lazy when we can, always allow
  to copy rowvector into columnvector, check the template parameters,
  try to factor the code better
* add missing copy ctor in UnalignedType
* fix bug in the traits of DiagonalProduct
* renaming: EIGEN_TUNE_FOR_CPU_CACHE_SIZE
* update the dox a little

test/cholesky.cpp

@@ -22,6 +22,7 @@
 // License and a copy of the GNU General Public License along with
 // Eigen. If not, see <http://www.gnu.org/licenses/>.
 
+#define EIGEN_NO_ASSERTION_CHECKING
 #include "main.h"
 #include <Eigen/Cholesky>
 #include <Eigen/LU>