Add no_assignment_operator to a few classes that must not be assigned, and fix a couple of warnings.

Rename map unit test to mapped_matrix: without splitting unit tests, this created a "map" binary file in the include path, not a good idea!

Revisit the implementation of random_default_impl for integer to make sure avoid overflows and compiler warnings.

Bug 63: add lapack unit tests. They are automatically downloaded and configured if EIGEN_ENABLE_LAPACK_TESTS is ON.

It's better to check that eigen_assert does raise an assert rather than testing the definition of NDEBUG

Improve BiCGSTAB robustness: fix a divide by zero and allow to restart with a new initial residual reference.

Add missing sparse matrix constructor from sparse self-adjoint views, and add documentation for sparse time selfadjoint matrix

Fix bug 611: fix const qualifier in cwiseProduct(sparse,dense) and SparseDiagonalProduct::InnerIterator

Bug 626: add compiletime check of the Options template parameter of SparseMatrix and SparseVector. Fix eval and plain_object for sparse objects.

Introduce a TEST_SET_BUT_UNUSED_VARIABLE macro for initialized but unused variables in the unit tests and also fix a few other warnings.