v0.3.0

Breaking

• Refactored GameInterface into a struct that is generic over any backend-implementation
• Refactored DolphinInterface into a struct that implements InterfaceProvider<Backend=DolphinBackend>

Additions

• Added InterfaceProvider trait for types that are caple of providing a game interface.
• Added MockInterface for writing testing logic without using a real backend.
• Added GameVar and GameVarMut traits to represent accessible regions of game memory in a strongly-typed manner.
• Improved amount of information availabe from InterfaceErrors
  • Added new variants for when a hooking attempt fails. InterfaceError::Unhooked represents when a previously
    hooked interface becomes unhooked.
  • Added InterfaceError::Io to wrap unexpected I/O errors instead of reducing them down to Other
  • Replaced InterfaceError::Other with InterfaceError::DataUnavailable and InterfaceError::Io
• Added Hans struct for interacting with Hans' state.