(DOCUMENT-18) Mention DLO cleanup in docs
Merge pull request #1075 from holguinj/DOCUMENT-18

(DOCUMENT-18) Mention DLO cleanup in docs
(maint) fix commands API examples

This includes an environment key in the replace-facts example so it works when copy pasted.

(cherry picked from commit 06e42200444b5e1e5f9171cdb7f69c2577ded625)
Changed our acceptance test setup to pin on facter 2.1.0

Facter 2.2.0 changed the value returned from the 'lsbmajdistrelease'
fact that causes the postgresql module to break on Ubuntu 10.04. Pinning
facter to 2.1.0 avoids the problem until the module can be released.
Merge pull request #1080 from senior/maint/stable/pin-tests-to-facter-2-1-0

Changed our acceptance test setup to pin on facter 2.1.0
Merge remote-tracking branch 'upstream/stable'

* upstream/stable:
  Changed our acceptance test setup to pin on facter 2.1.0
  (maint) fix commands API examples
  (DOCUMENT-18) Mention DLO cleanup in docs