* Script command instance_id now supports an instance mode argument. If no mode is given it will return the attached script's instance.
* Script commands instance_destroy, instance_npcname, instance_mapname, instance_announce now attach themselves to the script's instance by default.
* Script commands instance_enter and instance_warpall attach themselves to the player's IM_PARTY instance by default.
* Added getvariableofinstance command (similar to getvariableofnpc) to retrieve the instance variable outside the instance.
* Update documentation to match changes.
Thanks to @vykimo, @Atemo, and @Lemongrass3110!