Format/typo check 1996/eldby + improve alt code

The alt code that I added a while back had '#include's but to make it
more like the original I added '-include ..' to the CINCLUDE in the
Makefile.

The README.md has been typo/format checked.

1996/eldby/eldby.alt.c

@@ -1,5 +1,3 @@
-#include <stdio.h>
-#include <unistd.h>
 float s=1944,x[5],y[5],z[5],r[5],j,h,a,b,d,e;int i=33,c,l,f=1;int g(){return f=
 (f*6478+1)%65346;}m(){x[i]=g()-l;y[i]=(g()-l)/4;r[i]=g()>>4;}main(){char t[1948
 ]=" `MYmtw%FFlj%Jqig~%`jqig~Etsqnsj3stb",*p=t+3,*k="3tjlq9TX";l=s*20;while(i<s)