ansi: show ANSI art in a UTF-8 terminal, or as plain or shaded text

Draws an .ans file into a grid the way an ANSI-BBS terminal would (cursor
moves, the wrap at the SAUCE width, iCE colours) and writes it out as UTF-8:
in colour, --plain, or --mono with coloured areas shaded by brightness. info
prints the SAUCE record. One C99 file with no dependencies.

Makefile

@@ -0,0 +1,18 @@
+PREFIX ?= $(HOME)
+BINDIR ?= $(PREFIX)/bin
+MANDIR ?= $(PREFIX)/share/man/man1
+CFLAGS ?= -O2
+CFLAGS += -std=c99 -Wall -Wextra -pedantic
+
+ansi: ansi.c
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ ansi.c
+
+install: ansi
+	install -d $(DESTDIR)$(BINDIR) $(DESTDIR)$(MANDIR)
+	install -m 755 ansi $(DESTDIR)$(BINDIR)/ansi
+	install -m 644 ansi.1 $(DESTDIR)$(MANDIR)/ansi.1
+
+clean:
+	rm -f ansi
+
+.PHONY: install clean