+ * install.sh now installs the user manual as well
+ * (not quite a new documentable feature, but worth considering in
+ the light of the new SB-EXT:MUFFLE-CONDITIONS declaration): the
+ beginnings of a semantically meaningful condition hierarchy is
+ under development, for use in SB-EXT:MUFFLE-CONDITIONS and by
+ IDEs.
+ * fixed bug: DEFCLASS slot definitions with identical :READER and
+ :WRITER names now signal a reasonable error. (reported by Thomas
+ Burdick)
+ * fixed bug: CLOSE :ABORT T on appending stream no longer causes
+ file deletion.
+ * fixed bug: Invalid slot specification errors now print correctly.
+ (thanks to Zach Beane)