decodeFGHIURL: better comments, `var ijk` inside `for`
added .gitignore (Node flavour: node_modules etc.)
make README more precise
added package.json to make npm happy
fixed some style problems detected by jshint (in default mode)
group error codes in an object (code becomes slightly invalid)
private methods hidden inside the constructor (code logically fixed)
erased a non-ASCII character, made jshint (default mode) very happy
follow John Resig's self-calling constructor pattern
npm publish as version 0.3.0 (supports FGHI URL draft 0.3)