Removed locally resident ceedling in order to update to pull in submodule from GitHub repo
Added ceedling as a submodule. But looks like this change needs to be commited prior to repopulation in this repo
Removed erroneous addition of Ceedling submodule
Readded Ceedling as a submodule pointing at official Git repo
Updated Rakefile to add rake 'run', 'all' and initial 'ci' tasks for conveniently executing test utility and to provide a starting point for a CI build