Revert "Bumped buildout version to 2.1.1 (OMS-601)"

This reverts commit c9bf2ae58a4dd6c632bf28c754d960f5a8ca22c8.
Reorder .gitignore items (no content change)
Document bootstraping within virtualenv (OMS-601)
Merge pull request #227 from opennode/oms-601

OMS-601 Revert to old buildout version, update the docs