Add Coveralls glue code, but do not require developers to install it.
Generalise the changes for both Coveralls and Code Climate. We need to initialise both, since we can't decide what we rather have at this point.
More debug output when loading the gems for coverage reporting.
With RSpec, it's `rake spec`.
Add the code coverage gems to the CI bundler gems group.
Merge pull request #12 from coursemology-collab/lowjoel/fix-coveralls

Reinstate testing/code coverage