ipopt: update 3.11.9_1 bottle.
slepc: update 3.5.3 bottle.
ate-pairing 1.2

Closes #1508.

Signed-off-by: Ian Lancaster <ilancaster@gmail.com>
ate-pairing: add 1.2 bottle.
Updating corset formula for samtools 1.1 and corset version 1.04. This should resolve the compilation bugs reported on https://groups.google.com/forum/#!topic/corset-project/6KZgWR1uZlU
corset: add 1.04 bottle.