add a module for Eigen
add a module for Eigen

jack-oquin/catkin,harmishhk/catkin,asmodehn/catkin,beni55/catkin,ros/catkin,meyerj/catkin,beni55/catkin,ros/catkin,scpeters/catkin,thaddeustaylor/catkin,shyamalschandra/catkin,jack-oquin/catkin,thaddeustaylor/catkin,wkentaro/catkin,harmishhk/catkin,jack-oquin/catkin,shyamalschandra/catkin,scpeters/catkin,meyerj/catkin,ros/catkin,shyamalschandra/catkin,harmishhk/catkin,beni55/catkin,wkentaro/catkin,asmodehn/catkin,scpeters/catkin,wkentaro/catkin,meyerj/catkin,thaddeustaylor/catkin,asmodehn/catkin