Fix README

[mikedotexe]

Look at the picture here #1 and notice that some things have changed from the README. like I think it used to be called "reservation" but it's now "demo totals"

Go around clean stuff up. Also, the last section in the README is about the CSLI REPL, which isn't what we're about anymore. That's old hat. We're now onto:
https://github.com/csli-tools/cli

So let's figure out how to remove/replace that last part, too.