Cleanup pdf classes to use a trait like we do for email classes

The php4 friendly pattern of making up for not having traits that we use for the pdf tasks is hard yakka.

I'm gonna start doing the clean up on them that to use the email trait that we did for emails. First step I'll return functions to classes where only those classes use them - we had good intentions to share some of them but it will be easier to do that when they are on a trait

@DaveD - I think I'll need your help