ovl_En_Box OK, documented (#356)
* ovl_En_Box OK, documented
* Update spec
* Removed useless union
* renames, remove comments, move internal enums from header
* stylistic changes
* Remove unneeded prototypes and use documentation format for doc comments
* Misread git's merge solution
* EnBox_SetupAction and Actor_SpawnAsChild
* Cleanup
* Merge effects, defines for movement flags, swap dList and dListHead, cleanup...
