- rework the coefficients API

- make vectors use a separate loop unroller, so that copying a
row-vector into a col-vector is now possible
- add much more documentation
- misc improvements

doc/examples/class_DynBlock.cpp

@@ -1,10 +1,10 @@
 #include <Eigen/Core.h>
-USING_EIGEN_DATA_TYPES
+USING_PART_OF_NAMESPACE_EIGEN
 using namespace std;
 
 template<typename Scalar, typename Derived>
 Eigen::DynBlock<Derived>
-topLeftCorner(const Eigen::MatrixBase<Scalar, Derived>& m, int rows, int cols)
+topLeftCorner(MatrixBase<Scalar, Derived>& m, int rows, int cols)
 {
   return m.dynBlock(0, 0, rows, cols);
 }