script for setting up your machine for this proj

This is the start of a fix for #3, but (as it says in the readme) there are a few issues.  Also you may want to say something different in the readme.  I didn't include a one-liner (something like `git clone blah && cd getclojure-ui && sh scripts/install && rackup` ?).  Finally there's a lot of duplicated code in here.  I might try to move it into a function later, but I'd want to test that with zsh first.  Let me know what you think!