Add support for mapping gestures to scripts anywhere in NVDA.
Currently, there are two global gesture maps: the user map and the locale map.
This allows users and locale maintainers to add new bindings and override existing bindings in a single file.
See the inputCore.GlobalGestureMap class for details.
The user map is stored in gestures.ini in the NVDA configuration directory.
Loading of the locale map is not yet implemented.
