Removed random.lua

Lua is not a valid code for the robot. This program appears
to be pointless.
Rewrote "How to use the API.txt" into markdown

Now it looks well organised. Also removed most of the old and out-dated code that this was instructing you to do.
Changed TODO list into a markdown file

Looks cleaner, I still need to do testing of all of the markdown files though.
All of these commits were made from the command line, I have not yet previewed the
end result for the files.