improved error message when two projects in the workspace have the same name (fixes #151)
improved error message when two projects in the workspace have the same name (fixes #151)

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