delete ubuntu-ks.cfg - unused
remove unused scripts
updated puppetlabs-stdlib
new version of concat
removed old, unused files
Removing the ability to catch students up

The fundamentals::exercise class could be used in the past to
  help lagging students catch up. However for the past year, the
  files that are the solutions for the exercises have not been
  updated - due to fact that it is hard to update these separately
  from the courseware updates

The functionality was great, and in the future, we should work on
  a solution that achieves the same goal without requiring code
  duplication - possibly by re-using the sample solutions in the
  courseware-fundamentals repository
Merge pull request #165 from casharma/fund/cleanup

Fund/cleanup