New "callbackOnTalentDisturbed"

Added in some callbacks and stuff.

instance of it.

New hook "Boot:loadBackground"
Addons can add a new splashscreen by having a special boot-screen folder

Changed 'The Gaping Maw' icon to match item description

Dawn's Blade glow fixed
Blood-edge bad pixels fixed

Doesn't handle multiple slots terribly well.

As a side effect, stuff like lethality now shows up in weapon tooltips.

Training Talents can have the following fields:
- getMasteryPriority(self, t, kind) - Only the talent with the highest is used. Defaults to the talent level.
- getDamage(self, t, kind) - Extra physical power granted. Defaults to level * 10.
- getPercentInc(self, t, kind) - Percentage increase to damage overall. Defaults to sqrt(level / 5) / 2.

Should be compatible with all existing masteries.

fix bug with pickupFloor returning the wrong object picked up and rare bug with __new_pickup and stacks
clean up code

pickupFloor: Resolve ambiguity with picked up objects and stacks, pass num picked up to on_pickup and on_pickup_object check functiions.
Extend itemPosition to search by reference

fix bug in pickupFloor