Added ClearCase tasks contributed by Matt Trentini.
Added ClearCase tasks contributed by Matt Trentini.

rmboggs/nantcontrib,dahmage/nantcontrib,nant/nantcontrib,dahmage/nantcontrib,dahmage/nantcontrib,nant/nantcontrib,cgourlay/nantcontrib,rmboggs/nantcontrib,cgourlay/nantcontrib,cgourlay/nantcontrib,nant/nantcontrib,rmboggs/nantcontrib