remove npm scripts

They are not needed since *geoffrey* is supposed to be installed
globally.
remove version number from code
rewritten server script, changed option parser

server script: `server.coffee` -> `bin/geoffrey`
option parser: [minimist](https://github.com/substack/minimist) ->
[optparse](https://github.com/jfd/optparse-js)
added "for Nerds" hint

Since using *geoffrey* is quite hacky :D