Add Hotslog roles
Add Hotslog roles

The roles in Hotslog are designed to be mutually exclusive, but some
heroes can fill two roles E.G. Greymane "burst" and "sustain". I have
added the Hotslog "ambusher", "seige", "bruiser".

All role tags used:
- ambusher
- assassin
- bruiser
- burst
- global
- healer
- melee
- multi-class
- ranged
- seige
- specialist
- sustain
- support
- tank

chetjan/heisenslaught,chetjan/heisenslaught,chetjan/heisenslaught,chetjan/heisenslaught,chetjan/heisenslaught