Changed pointers back to references (seems like a better interface, after experimenting with a main() routine).
Changed pointers back to references (seems like a better interface, after experimenting with a main() routine).

git-svn-id: 8a710814d27451b4b776ee3b2cac0ffa1e6cd819@15 f381375e-2823-4fb2-bad6-22fa55754e8c

cwrowley/ibpm,cwrowley/ibpm,cwrowley/ibpm