change to compile on windows. unicode is not yet supported in the windows
version of the repl.
c/expeditor.c
original commit: 4d2f900b2c43a8be384444d965177f1410c2ab82
except that combining characters are not treated correctly for
line-wrapping. this addresses github issue #32 and part of issue #81.
c/expeditor.c, s/expeditor.ss
original commit: 87d4811781d7e9183f7710aa6a809b850a38454f
