Jshint warnings



Hi folks,

I got 2 new features:

    configFile can also be an absolute path (my issue #43)
    Separation of Errors/Warning (issue #30)

Tests:

    added only one test for the absolute path, an existing one does already test the relative part.
    For Errors/Warnings: This had impact to several existing tests and so I just refactored them and made them all green again.

Please review it, and I hope this could be part of 1.3.1.
Cheers,
Sebl

EDIT: now on branch.