Custom Delimiter Support

[mal]

Implements GH-1.

This will allow one additional single character delimiter to be used in conjunction with the existing syntax, allowing support for querystrings such as:

foo.bar[0].boing[he.llo].world.rawr=rawk.txt

To be parsed correctly with the . delimiter as:

{ foo: { bar: [ { boing: { 'he.llo': { world: { rawr: 'rawk.txt' } } } } ] } }

Found this behavior mentioned on restify/node-restify#94 which lead me to GH-1, figured I'd give it a whirl; feedback welcome.

[mal]

Just saw the coercion branch. Hold off on merging and I'll submit one in the style, and more compatible with that branch tonight to ease work down the line.