gavl: Todo List

# Todo List

Global gavl_samples_to_time
  Write this as an overflow save function

Global gavl_time_to_samples
  Write this as an overflow save function

Global gavl_frames_to_time
  Write this as an overflow save function

Global gavl_time_to_frames
  Write this as an overflow save function

Global gavl_time_scale
  Write this as an overflow save function

Global gavl_time_unscale
  Write this as an overflow save function

Global gavl_time_rescale
  Write this as an overflow save function