Crashes were due to missing translation. This PR temporarily replaces the translateString calls for the default string directly.
in `select_hero_class.go` there is a level of indirection before the call to translateString, and for this reason, its `panic` call got temporarily diverted.
* Switch items to dynamic load with a common struct, add misc.txt loading
* Update Ebiten Reference
* Switch references to point to D2Shared
* Migrate part 2
