Remove -SNAPSHOT from version number

Harald is not a library and will not be distributed through a Maven
repository. There is no need for a -SNAPSHOT suffix on it's version
number.
Add restify hello world sample
Make `lein repl` work again

`lein repl` does not work, when :main is set to a string. Since the
target is set to nodejs, executing the program works with `./harald.js`.
Refactor server and routing