* work against more correctly assigning instance mode to entities and loot
- added manually collected data for difficulty versions of gameobjects, just boss chests for now.
update setup/source to default object source to base difficulty version if able
- update spelldifficulty table to contain the (likely) mapmode it will be used in
* refactored class loot
- implement loot mode indicators on listview for creature and gameobject loot
- show 'drops' listview tab on instance zone page
- fixes against tribute chest systems (toc / ulduar)
- fix icc gunship battle chest ownership
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