Added Easier Double Parsing Support and Cleaned ParserEvaluator.hs

No small amount of credit to Stevely of FP Complete,
http://goo.gl/cwYGXt
Anyway, added support for parsing doubles without having to type in #d
beforehand
Also, I switched to emacs, and it did some serious stylistic fixing -
the code is far less ugly now
Modified REPL.hs, stdlib.scm, added tags

Emacs cleaned things up for me.  Woohoo!
Ignoring compiled files

‘nuff said