Support Custom Game Types

[joshuaskelly]

Summary

Enhance Delver Engine to support different types of games by providing extension points for custom player implementations and custom hud implementations.

Goals

1. Preserve existing player behavior.
2. Support a typical retro shooter style player. Think Wolfenstein/Doom.
3. Support a third person camera. Example mockups

Child Issues

• HUD Abstraction #99 HUD Abstraction
• Player Abstraction #100 Player Abstraction

[Interrupt]

A good potential place to wire this in would be in the data/game.dat file, that could be expanded to have fields for the Hud / Game that could be switched out with different classes if there was a stub interface that the Delver specific huds / game could implement. It might make sense to move the player in here as well, instead of there being a data/player.dat file.