Reinsert OpenMetaverse.dll from commit fbdf507 from an accidental replace in f1f935e

This only affected pCampbot.
Replace two connecting bots state booleans in pCampbot with a single state machine.

Also adds "show status" command to pCampbot that currently just shows bot connecting state
Include same content filters for IAR file exports that already exist for OAR files. Adds new console switch --perm=CTM to save iar command.
Change existing IAR save to use UUID for its callback reference instead of Guid. This is for uniformity as discussed on IRC.
Add an event callback for loading IAR files. The callback for creating them already existed but not for loading. This is of interest for use by region modules. Also includes reporting numbers of items saved and items filtered to the completed log printout.
Modifications to previous IAR commits to bring them more inline with existing OpenSim code conventions. Also include new IAR save switch in console help print out.