---> Now only product_large fails with EIGEN_DEFAULT_TO_ROW_MAJOR.
* Fix EIGEN_NO_ASSERTION_CHECKING tests option
* Fix a crash in Tridiagonalization on row-major matrices + SSE
* Fix inverse test (numeric stability noise)
* Extend map test (see previous fixes in MapBase)
* Fix vectorization_logic test for row-major
* Disable sparse tests with EIGEN_DEFAULT_TO_ROW_MAJOR
* remove the automatic resizing feature of operator =
* add function Matrix::set() to be used when the previous
behavior is wanted
* the default constructor of dynamic-size matrices now
creates a "null" matrix (data=0, rows = cols = 0)
instead of a 1x1 matrix
* fix UnixX typos ;)
* replaced the Flags template parameter of Matrix by StorageOrder
and move it back to the 4th position such that we don't have to
worry about the two Max* template parameters
* extended EIGEN_USING_MATRIX_TYPEDEFS with the ei_* math functions
* faster matrix-matrix and matrix-vector products (especially for not aligned cases)
* faster tridiagonalization (make it using our matrix-vector impl.)
Others:
* fix Flags of Map
* split the test_product to two smaller ones
