class library: protect system syth defs from hanging note envelope bug
class library: jitlib: rename reshaping types.

The reshaping types "minmax" and "max" were not so well chosen names. Also they suggested that "min" was implemented, but this would have been overly complicated and maybe not really useful.

So 'minmax' is now 'elastic' and 'max' is 'expanding'.
class library: jitlib: cleaned up debugging statements
help: jitlib: improve and update documentation
class library: jitlib: avoid breaking code, add deprecation warnings