* fixed lint errors in button.go
* fixed lint errors in checkbox.go
* Removed d2ui singleton, fixed nearly all lint errors
- Changed `UI` struct to `UIManager`, removed singleton
- UI element provider functions are now methods of the UI Manager
- Screens now use the UI manager to create UI elements
- game panels in d2player now use the UI Manager to create UI elements
- Only the UI manager knows about "widgets"; calls to `d2ui.AddWidget` in Screen instances have been removed
* changed ui element provider methods from `Create` to `New`
- fixed lint errors in d2interface
- removed `archived_` from interface names, was not necessary
- removed the Bitmuncher and Bitstream interfaces, as they are too specific and unnecessary
* adding simple inventory item descriptions
* adding method to identify items
* offset description so it doesn't overlap with item in inventory grid
* needed to offset inv panel by 1px
* adding debug printing boxes for entity bounds
* minor edits
- adding `spawnmon` command. currently does not have a netpacket, just for debug
- adding `GetSize` method to map entities for getting frame bounds (for debug printing)
* bug fix
* added highlight to animated entity
* moving provider functions for item, missile, npc, player into package export file d2mapentity.go
* changed `Create` to `New` in map entity provider functions
* add item highlight on hover
* add Name method to item entity
* Working sound engine and sound environments
* Clean up sounds.txt loader
* Make global volume settings apply properly
Als shuffle some stuff around
* Reset sound engine on game unload
* wip d2items system and item properties
* added loader for TreasureClassEx.txt
* wip item spawn from treasure class records
* wip items
* add call to init item equivalencies, remove treasure class test from d2app
* made item affix records global var a map of affix codes to the records
* changed how item to item common record equivalency is determined
* changed set items records export to a map of their codes to the records, grouped property params into a struct
* changed property parameter field from calcstring to string
* fixed bug in stat value clone
* adding equipper interface as part of stat context, eventually to be used to resolve set bonus (among other things)
* made the item interface simpler, only needs name and description methods
* adding equipper interface, for anything that will equip or have active items
* handle case where min and max are swapped, removed commented code
* added property/stat resolution for magic, rare, set, and unique items
* adding item generator which can roll for items using treasure class records
* fixed item equivalency func being called in the wrong spot
* added item spawning
- added packet type for spawning items
- added client/server handlers for SpawnItem packets
- added map entity for items
- added simpler item provider function in diablo2item package
- added debug terminal command for spawning items
* wip d2items system and item properties
* added loader for TreasureClassEx.txt
* wip item spawn from treasure class records
* wip items
* add call to init item equivalencies, remove treasure class test from d2app
* made item affix records global var a map of affix codes to the records
* changed how item to item common record equivalency is determined
* changed set items records export to a map of their codes to the records, grouped property params into a struct
* changed property parameter field from calcstring to string
* fixed bug in stat value clone
* adding equipper interface as part of stat context, eventually to be used to resolve set bonus (among other things)
* made the item interface simpler, only needs name and description methods
* adding equipper interface, for anything that will equip or have active items
* handle case where min and max are swapped, removed commented code
* added property/stat resolution for magic, rare, set, and unique items
* adding item generator which can roll for items using treasure class records
* fixed item equivalency func being called in the wrong spot
