* basic support for multicore CPU via a .evalOMP() which

internaly uses OpenMP if enabled at compile time.
 * added a bench/ folder with a couple benchmarks and benchmark tools.

Eigen/src/Core/MatrixBase.h

@@ -359,6 +359,7 @@ template<typename Scalar, typename Derived> class MatrixBase
     /// \name special functions
     //@{
     const Eval<Derived> eval() const EIGEN_ALWAYS_INLINE;
+    const EvalOMP<Derived> evalOMP() const EIGEN_ALWAYS_INLINE;
 
     template<typename CustomUnaryOp>
     const CwiseUnaryOp<CustomUnaryOp, Derived> cwise(const CustomUnaryOp& func = CustomUnaryOp()) const;