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.

bugs.md

@@ -3114,6 +3114,15 @@ A workaround is inserting a whitespace: `C2 E2`.
 --
 
 
+## 2013 endoh4
+
+### STATUS: INABIAF - please **DO NOT** fix
+### Source code: [2013/endoh4/endoh4.c](2013/endoh4/endoh4.c)
+### Information: [2013/endoh4/README.md](2013/endoh4/README.md)
+
+Invalid input files will very likely crash the program.
+
+
 
 ## 2013 hou