Add defn keyword

[m3tti]

It would be nice if there is a keyword for
(def hello fn [] "Hello")
like in clojure
(defn hello [] "hello")

[yosbelms]

@m3tti, I've thought of add defn, but I discarded the idea because defn should be a macro, and RamdaScript doesn't support macros. I prefer to keep things simple. Currently the way to define/export a function in RamdaScript is:

(def someFn (fn [] 'Hello'))

As you can see, a function is just a value. I recommend to break the line just after the parameter list for better readability, example:

(def someFn (fn []
    'Hello'))

I will publish a full-featured TodoMVC using RamdaScript, ReactJS, and Flyd soon.