Add missing EIGEN_DEPRECATED annotations to deprecated functions and fix few other doxygen warnings

Eigen/src/Core/Reshaped.h

@@ -12,6 +12,7 @@
 #define EIGEN_RESHAPED_H
 
 namespace Eigen {
+namespace internal {
 
 /** \class Reshaped
   * \ingroup Core_Module
@@ -43,7 +44,6 @@ namespace Eigen {
   * \sa DenseBase::reshaped(NRowsType,NColsType)
   */
 
-namespace internal {
 template<typename XprType, int Rows, int Cols, int Order>
 struct traits<Reshaped<XprType, Rows, Cols, Order> > : traits<XprType>
 {