Various addons: Adjustments to new API
Merge pull request #667 from Kinematics/4.1-dev

Pet validation issues.
GearSwap: Update gain/lose buff event handlers to use IDs (new API).
GearSwap: Update job change event handler to only use IDs (new API).
GearSwap: Revise world info update to account for IDs (new API).
Add zone resource loading so that we can convert zone id to a value.
Change apparent weather to be the storm buff if that's the source of the weather