fix typo in doc
refactoring
better names
better names
improve fast implementation -- the interface has to be stricter because of it
switch to Applicative whereever possible
optimization: use IntMap and add ticker
simplificaton & rename
simplification in semantics
simplification
add askPostpone
elim registerCallback
add onChange value test
bugfix
scheduling bugfix
add schedule test
add newId
simplification
use RefWriterOf
simplification: get rid of Modifier associated type