* Remove weapons, armor, misc, itemCommon, itemTyps datadict singletons
- removed loader calls from d2app
- removed the HeroObjects singleton from `d2core/d2inventory`
- added an InventoryItemFactory in d2inventory
- package-level functions that use data records are now methods of the InventoryItemFactory
- renamed ItemGenerator in d2item to ItemFactory
- package-level functions that use records are now methods of ItemFactory
- d2map.MapEntityFactory now has an item factory instance for creating items
- fixed a bug in unique item record loader where it loaded an empty record
- added a PlayerStateFactory for creating a player state (uses the asset manager)
- updated the test inventory/equipment code in d2player to handle errors from the ItemFactory
- character select and character creation screens have a player state and inventory item factory
- updated item tests to use the item factory
* minor edit
* Removed d2datadict.Experience singleton
added a HeroStatsFactory, much like the other factories. The factory gets an
asset manager reference in order to use data records.
* removed d2datadict.AutoMagic singleton
* removed d2datadict.AutoMap singleton
* removed d2datadict.BodyLocations singleton
* removed d2datadict.Books singleton
* Removed singletons for level records
- removed loader calls in d2app
- changed type references from d2datadict to d2records
- added a `MapGenerator` in d2mapgen which uses thew asset manager and map engine
- package-level map generation functions are now MapGenerator methods
- `d2datadict.GetLevelDetails(id int)` is now a method of the RecordManager
* remove SkillCalc and MissileCalc singletons
* Removed CharStats and ItemStatCost singletons
- added an ItemStatFactory which uses the asset manager to create stats
- package-level functions for stats in d2item are now StatFactory methods
- changed type references from d2datadict to d2records
- `d2player.GetAllPlayerStates` is now a method of the `PlayerStateFactory`
* Removed DkillDesc and Skills singletons from d2datadict
- removed loader calls from d2app
- diablo2stats.Stat instances are given a reference to the factory for doing record lookups
* update the stats test to use mock a asset manager and stat factory
* fixed diablo2stats tests and diablo2item tests
* removed CompCodes singleton from d2datadict
* remove cubemain singleton from d2datadict
* removed DifficultyLevels singleton from d2datadict
* removed ElemTypes singleton from d2datadict
* removed events.go loader from d2datadict (was unused)
* removed Gems singleton from d2datadict
* removed Hireling and Inventory singletons from d2datadict
* removed MagicPrefix and MagicSuffix singletons from d2datadict
* removed ItemRatios singleton from d2datadict
* removed Missiles singleton from d2datadict
* removed MonModes singleton
* Removed all monster and npc singletons from d2datadict
- MapStamp instances now get a reference to their factory for doing record lookups
* removed SoundEntry and SoundEnviron singletons from d2datadict
