Improve how to reconfigure coords in 2014/deak

The Makefile now has variables so that one can do something like

    make X1=-1 Y2=-1 clobber alt

or whatever, with the variables X1, X2, Y1 and Y2 set to what the author
originally had it as.

The alt code still has #ifndef..#endif so that one can (if they want to
be silly) compile it without make(1).

2014/deak/README.md

@@ -57,6 +57,12 @@ You may pick and choose which ones to redefine.
 Use `prog.alt` as you would `prog`.
 
 
+### Alternate try:
+
+```sh
+./try.alt.sh
+```
+
 ## Judges' remarks:
 
 We consider this entry a tribute to all "Abuse of the C preprocessor"