TargetWatcher

Added the ability for healers to enable a heal mode that will select the target, not the target of the target (/tw heals).  update the auto tank select to account for floaters in groups above 20 (changed to 25 for 5 tanks).  also /tw defaults to reset TargetWatcher to default settings.

Commands:
/tw  - this will show the following commands in game
/tw defaults - Reset all variables to default values
/tw show - Force show (override)
/tw hide - Force hide (override)
/tw auto - Restore automatic behavior if pets are enabled and active or in a party 
                 it will show otherwise it will hide
/tw pvp - Enable/Disable in Battlegrounds
/tw tanks X - Set number of tanks (1-5).
/tw tanks auto - Number of tanks based on Party/Raid size.
/tw heals - Enable/Disable the target of target for quick targeting of tanks for healers
/tw petmode X - (all, mypet, none) Sets if pets are displayed in dropdown lists
/tw listall - Enable/Disable all classes in dropdown.