Add alt code: since I'm a lost :-) vim user and the author provided how
to add back support for arrow keys I made this in the alt version.
Updated .gitignore for this.
Format fix README.md.
Fix link.
Added link to Yusuke Endoh's analysis of the entry as he offers some fun
commentary and especially fun is how to cheat. Perhaps I should not do
that but since he provided some other fun comments and since the
README.md files are no longer supposed to have spoilers as such why not.
