runtime/{Mmake, ext_stdio.h}
Remove ext_stdio.h, since it wasn't being used.
runtime/memory.c:
Remove declarations of popen() and pclose(), since they are not
used.
runtime/conf.h.in:
Remove #define for HAVE_CWD_DECL, since we don't use cwd().
memory.c:
Now memory diagnostics are printed on stderr.
wrapper.mod, memory.c:
Convert whens to cases and ors to else ifs.
other files:
copyright notices.
Cakefile:
Don't include the default definition of main/2 in the library.
ext_stdlib.h:
Remove most of the stuff here, since it was causing problems
compiling on Irix.
ext_signal.h:
Remove definition of MINSIGSTKSZ.
io.mod:
Line numbers start from 1, not 0.
io.mod, wrapper.mod, wrapper.h:
Implement io__{set,get}_exit_status.
prof.h:
Add declaration of prof_current_proc.
