[facter/el6] (6 commits) ...Merge branch 'master' into el6

[Todd Zullinger]

Summary of changes:

  4724633... Only run rspec checks on Fedora >= 17 (*)
  4bf6c00... Disable useless debuginfo generation (#795106, thanks to Vi (*)
  93f8b33... Update summary and description (*)
  bdbe815... Remove INSTALL from %doc (*)
  7f8ab51... Update to 1.6.6 (*)
  509df4c... Merge branch 'master' into el6

(*) This commit already existed in another branch; no separate mail sent