Merge branch 'master' into development

* master:
  Fix the 'negative argument' problem - Closes #47
  Update a spec that was passing when it shouldn't have been and pend it until we can implement the fix
  Upgrade rspec and fuubar
  When dividing up the remainder of the length and determining how much space a completed bar should take up, round down so that the bar doesn't complete until 100%
  Add tags file to gitignore