Basic setup

### As an end user of grunt-doctest, I want to be able to  get the results of my doctests.

Acceptance Criteria: 

grunt-doctest will take the following options:

module, i.e. commonjs, amd
fileGlob, i.e. '**/*.js'

I expect to get the results of the doctests from the expanded fileGlob. The build should fail if one of my doctests fails. I expect to see the error description, the file and line number where the doctest failed.