Adds rate controls that can be used in xml files. Rate controls are only relative for the time being, as there is no valid reason for them to be absolute, except to sync with audio or maybe in game events. Relative allows for global rate controls to work (for accessiblity), so they are the only supported form for now.
closes #7
Adds rate controls that can be used in xml files. Rate controls are only relative for the time being, as there is no valid reason for them to be absolute, except to sync with audio or maybe in game events. Relative allows for global rate controls to work (for accessiblity), so they are the only supported form for now.