Revert "Too many dependency issues with coveralls, I can live without it."

This reverts commit 269b27c700d8635cafa61c7a6c4a4caea9f4706c.
Merge branch 'master' of github.com:jamesrwhite/minicron

* 'master' of github.com:jamesrwhite/minicron:
  Update README.md