Support Mules

[HeartofPhos]

Would be nice to toggle classes you're willing to mule, need to come up with reasonable way to define how far into quest line a user would want to mule

[aasmall]

I tried to do this manually this league launch, edited the beginning of act 1

#section Act 1
Find and kill on mule {kill|Hillock}
➞ {enter|1_1_town} #Lioneye's Watch
Hand in {quest|a1q1} #Enemy at the Gate
Find and kill {kill|Hillock}
➞ {enter|1_1_town} #Lioneye's Watch
Hand in {quest|a1q1} #Enemy at the Gate
➞ {enter|1_1_2} #The Coast
#ifdef LEAGUE_START
    Get {waypoint_get}
#endif

This resulted in doubling my raise zombie gems :)