Support reusing blocks after hfree (not perfect -- need to combine)
Support POSTPONE <literal>
Add size diagnostics
Fix stack leakage when scrolling block out of bounds
Correct ABORT semantics from DPANS94
Bump copyright
Allow recognizing V9t9 files with reclen==0 (e.g. V9t9 v6.0's FORTHDSK)
Allow assembler to consume Editor/Assembler formatted files
Improve error-handling reading unfamiliar disk images
Add MFM reading support (!)
Allow selecting all-caps DSK/TRK files
Fix FM vs. MFM reading & writing
Fix bug identifying object files; close disk selector when running executor
Expose secret commands in catalog
Handle updating disk header once more tracks/sides are written
Apply slowdown for GROM access
Cleanup and fixes
Exclude utilities