make config file compatible with coffeelint standard approach

[funkyeah]

http://www.coffeelint.org/

The standard coffeelint configuration does this when looking for a config file:

New in 1.0: CoffeeLint will automatically pick up config files. When linting a file (as opposed to stdin) it will walk up the directory tree looking for a coffeelint.json or a package.json that has a "coffeelintConfig" object.

It would be nice if meteor-coffeelint supported this in some way. Without the support for the standard way it becomes incompatible with IDE linters and other linting systems that use that standard approach e.g. AtomLinter: https://atom.io/packages/linter-coffeelint