corset: update for samtools 1.1 and corset 1.04.

Updating the corset formula for the new versions of samtools and corset.
This should resolve the compilation bugs reported on
https://groups.google.com/forum/#!topic/corset-project/6KZgWR1uZlU
Just to clarify (since this is my first time doing this!), you would like to me to resubmit with the bottle section restored?