1996 fixes and updates

Update the README.md files - at least with those not in a previous
commit. The updates mostly include formatting (make them markdown) but
probably also typos here and there. More probably has to be done with
these files.

The 1996/august/.gitignore was updated as well with a file that is
generated by one of the suggested commands.

1996/huffman/README.md

@@ -17,6 +17,9 @@
 
 	echo 'Huffman Decoding' | ./huffman
 
+NOTE: this program uses `gets()` so you will likely get a warning when compiling
+and/or running on modern systems.
+
 ## Try: 
 
 	echo 'seeing or feeling is believing' | ./huffman