Ignore @TAG END in .mus file.
Insert license info.
Remove obsolete IBOutlets.
Move ACMWindow to ACMDocumentCommon.
Move more IBOutlets and actions to ACMDocumentCommon.
Import ACMProgressSlider.
Move more to ACMDocumentCommon.
Add acmEpilogueStateChanged: to ACM protocol.
Respond to acmEpilogueStateChanged:.
All mods to support Enhanced Edition and BIFF files.