A new make-event feature was introduced. It is almost like macros that take state. Better support was provided for :definition rules with :expand hints. Disabling guard checking was added. User-contributed books are now supported, and a variety of features have been improved, including guard verification involving ground terms, theory invariants, and diabling defthm events. A soundness bug related to certain local events has been fixed, as have minor bugs related to cw-gstack, wet, embeddable events, the prompt, proof trees, stobj printing, and :puff.
