as discussed on list: default to align cols, reorganize parameters accordingly so that the default corresponds to 0 flag,

and implement FullPrecision output (non-default).

Eigen/src/Core/MathFunctions.h

@@ -25,7 +25,7 @@
 #ifndef EIGEN_MATHFUNCTIONS_H
 #define EIGEN_MATHFUNCTIONS_H
 
-template<typename T> typename NumTraits<T>::Real epsilon()
+template<typename T> inline typename NumTraits<T>::Real epsilon()
 {
  return std::numeric_limits<typename NumTraits<T>::Real>::epsilon();
 }