New Private Message plugin

Well, triggered by some bug reports on the existing PM system, it seems the current PM code has some obvious limitations in .7 (thanks peterleese).

Well, triggered by some bug reports on the existing PM system, it seems the current PM code has some obvious limitations in .7 (thanks peterleese). This was the very first plugin I ever wrote for e107 and have attempted to upgrade it over time, but let's face it...the code is pretty aweful.

Because if this, I will be coding an entirely new PM plugin. It will totally replace the current one, since I see nothing I want to reuse. You may lose all current PMs in your db, I haven't decided if I'll do a conversion script or not.

Since I really don't use PM much, I am asking the e107 community for additional functionality. Some things I plan on adding:

Inbox and Outbox, with space limits for each.
Allow attachments (restrict permission by userclass)

This new plugin WILL make it into .7, so any of these suggestions that I think are sensible and I can do relatively easily I'll get them in there. I appreciate all your help.