commsec: update ground station.
cabal files: remove license file dependencies.  All cabal files are covered by the top-level license.
hxstream: wibble.
Commsec: working implementation on ground side.

TODO:
* Add HxStream over top.
* Implement SMACCMPilot side.
wibble
rename tom-aes-test to commsec-test
commsec-test: fixup interopTest to build against cipher-aes-0.2.3