Fix how emails handle replying

Almost every email needed to have either a different from address or
add a reply-to address. In most cases, this is the instructor email,
but sometimes it has to be something more general.
Service description presenter
Try to set the from when reporting an exception
Merge pull request #81 from agentphoenix/hotfix/email-reply-to

[Hotfix] Add email reply-to
Merge pull request #82 from agentphoenix/develop

Email and event fixes