Add option for config file in local project.
Allow options to be merged with config file options

File options are overwritten by task level options.
change option key from 'config' to 'configFile' to make it similar to other grunt tools
fixed spacing to satisfy lint tests.
Added 'test' target for grunt since Travis CI was calling npm test that called grunt test... but 'test' did not exist in the gruntfile.
Merge pull request #23 from kburson/master

Allow config file for lint options