Preliminary edits to 3.2.1. release notes to stay with same structure done at 3.2.0.
DOC-402: Added line in the best practices telling admins to monitor the database in the CLC for expansion.
Adding training files to the repo.
Merge branch 'master' of git.eucalyptus-systems.com:documentation
DOC-402: edit from technical review.
Merge branch '3.2.1-dev'

Conflicts:
	content/en_us/shared/conrefs.dita