Make Word instances proper IFn's
Invoke var's for words in compiled definitions, just like emitted code does
Clean up createVar and how it's called with metadata, ensure Words get {:word true} metadata
Delete commented code block
When analyzing Symbols that are Vars, don't add extra layer of Word handling
Detect ClojureExpr's that are either fn's with word metadata or Word instances themselves
Incorporate Gershwin core tests as part of build cycle, correct gershwin/main.clj for script entry-point