App modules no longer have key map files!
Instead, all gesture bindings are done in the app module itself. This keeps everything together in the one place, removes the appModules folder in the NVDA binary distribution (which only contains kbd files) and removes one stage of gesture mapping (which will be necessary to simplify future enhancements).
Note that desktop and laptop bindings, as well as bindings common to both, can all be provided in the same gesture map now, which eliminates another reason for these key map files.
The most common way to bind gestures is to use a magic __gestures dict on the class. bindGesture() can also be used on the instance. See the code doc for baseObject.ScriptableObject for more details.
It's not currently possible for users to override the in-built bindings. This is coming in future.
