Update PetTP.lua

Fix picking up despawning pets.
Update current hp totals from npc update messages
Changes to unknown pet name handling
Update PetTP.lua
Add PetTP info
fix petname not updating
Fix incorrect pet name/stats when fast casting
Updates to fix mixing pup and other jobs
Reset pet stats upon picking up a dead pet
Merge pull request #691 from SnickySnacks/4.1-dev

Final updates to PetTP before release, addons.xml updated