Lots of little changes for sending email to the right places, with
proper headers. Split out some of the mail into testbed-logs, testbed-ops, and testbed-approval. Added a library for including from our perl scripts. Contains a couple of mail helper functions, but will hopefully contain more as time goes by. Fixed a bug in the web interface that was causing breakage for people with multiple accounts. Mac and Jay have noticed this, when logging out and trying to join or create a project under a new or different name.