add a new totem keystone for melee

Location: SW part of the tree, between Mara and Duelist starting zone.

Name: whatever

Effect:
-Your totems Cannot be Damaged
-Your totems cannot deal any damage or cast any spells
-10% increased effect of buffs granted by your totems

Last line is optional, i'd keep that to hint players what this is useful for. 10% is much less than what Panopticon gives so w/e.