Remove a bit of unnecessary code
Add carbon.exceptions

For now, this only contains CarbonConfigException, but we can add
more later down the road depending on what types of failure conditions
we want to gracefully handle and report. I see a lot of ceres related
potential here.
Update carbon.conf and it's unit tests for the new exception

Also silence an annoying DeprecationWarning when running the tests
Update daemons to use new exceptions and gracefully print them
Updating test to not use deprecated e.message