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/Makefile

@@ -62,7 +62,7 @@ CDEFINE= -DZ=35000
 
 # Include files that are needed to compile
 #
-CINCLUDE=
+CINCLUDE= -include stdio.h -include unistd.h
 
 # Optimization
 #

1996/eldby/README.md

@@ -36,12 +36,19 @@ make CFLAGS+="-DZ=20000" clobber alt
 Besides the fact that modern systems make it impossible to see what this program
 does the rapid movement can be a problem for some people. It is for these
 reasons that we recommend you first try the alternate version as described
-above. If however you wish to see the original version in modern systems, try:
+above.
+
+
+### Original build:
+
+If however you wish to see the original version in modern systems, try:
 
 ```sh
 make all
 ```
 
+### Original use:
+
 Use `./eldby` as you would `./eldby.alt` above.
 
 
@@ -55,7 +62,7 @@ in a very small chunk of code.
 
 This program shows flying spheres. The program eats CPU on lesser
 equipped systems. The program will run until termination. Terminal
-must be vt100 or better with 80 columns and 24 rows or more.
+must be VT100 or better with 80 columns and 24 rows or more.
 
 
 ## Copyright and CC BY-SA 4.0 License:

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)