Update Barbarian active skills and add Avalanche

I made an attempt to update all the Barbarian active skills and to add Avalanche. There were only a few problems I ran into.

* I missed adding "weapon-damage-type" on the first half of the skills I updated. It wasn't until then that I realized that was a property. This might be a bigger undertaking, since active skills can have different damage type that is not listed in the skill or rune text.
* Ancient Spear - Boulder Toss adds 20% damage for every 1 point of Fury spent. I entered "weapon-damage" as 2000%, since that would be the max damage without any passives.
* Revenge & Avalanche runes that use charges, I just reduced the cool down of the skill. Not sure if there is a better way to account for these.
* There are a few skills that add Life on Fury. There wasn't a property that I found already existed for this, so I ignored them for now.