Add addTrap to TypedPipe
Working on it
Add back type safety and correctness, not quite there
Resolve conversion error
Add second test, add pipe renaming for multitrap
Clean up and unify TypedItsATrapTest
Merge pull request #844 from twitter/jco/typed_addTrap

Add addTrap to TypedPipe
Merge https://github.com/twitter/scalding into develop