Added examples for casting, made better examples for Maps (transplanted from 90f8b868e6e24a198168502402e05fba06b6f652)
Added examples for casting, made better examples for Maps
(transplanted from 90f8b868e6e24a198168502402e05fba06b6f652)

--HG--
branch : 3.2

robustrobotics/eigen,robustrobotics/eigen,robustrobotics/eigen,robustrobotics/eigen