Improvements to build and script of 2013/endoh4

The Makefile was modified in such a way that allows one to easily
redefine the size (in the code the S macro). For instance:

    make clobber SIZE=50,50 all

The try.sh was renamed to endoh4.sh as it's more of a wrapper to the
program rather than things to try. Also it now lets one specify more
than one file to feed to the program (in sequence).

The bugs.md was updated - added INABIAF. If the file format is invalid
it will very likely crash.

2013/endoh4/endoh4.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 2013/endoh4
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+[[ -z "$CC" ]] && CC="cc"
+
+# let user redefine size. This requires that we clobber so that they can change
+# it each time.
+[[ -z "$SIZE" ]] && SIZE=70,23
+
+make clobber CC="$CC" SIZE="$SIZE" all >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+# set it so that when program is terminated through various signals we re-enable
+# the cursor
+trap "tput cnorm;echo" 0 1 2 3 15
+
+# temporarily disable cursor
+tput civis
+
+# run program attempting to feed it a file, if specified
+if [[ "$#" -gt 0 ]]; then
+    while [[ "$#" -gt 0 ]]; do
+	read -r -n 1 -p "Press any key to run: ./endoh4 < $1: "
+	echo 1>&2
+	./endoh4 < "$1"
+	echo 1>&2
+	shift 1
+    done
+else
+    # otherwise feed the source code of the program to the program
+    read -r -n 1 -p "Press any key to run: ./endoh4 < endoh4.c: "
+    echo 1>&2
+    ./endoh4 < endoh4.c
+    echo 1>&2
+fi
+
+# explicitly set cursor back just in case it's not terminated through one of the
+# above signals
+tput cnorm