#51 String delim matchers should be regexps

[Mike Sperber]

This is in reference to

http://www.geocrawler.com/archives/3/8784/2001/6/0/5884081/

With the recent trouble with fps (documented on
comp.lang.scheme.scsh), I'm now convinced this
should count as a bug, and that the pre-0.5.2
behavior should be reinstated. For 0.6, the
issue should be reconsidered.

It's a serious embarrassment that MINOR version updates
keep breaking basically all the scsh software out
there. Worse, we don't ship a list of
incompatibilities.