0.8.2.37

0.8.2.37
	Rename return_to_lisp_function to arrange_return_to_lisp_function,
	as threatened

	SIG_INTERRUPT_THREAD presently only exists on Linux: add
	#ifdef to avoid breaking other x86en

	Darwin complains "union has no member named `sival_int'" in
	handle_rt_signal.  But we're only using that in thread builds
	anyway, so #ifdef it

	Bug 75 (:ELEMENT-TYPE for WITH-OUTPUT-TO-STRING) was fixed in
	some previous version: remove from BUGS file

	Shameless autopuffery, plus some amount of transpuffery, in
	CREDITS file.

	Update NEWS file

	tests/.cvsignore: don't tell me about threads-foreign-code.*