Add lib/*.js in JSHint target and the jshint one in test.
Add lib/*.js in JSHint target and the jshint one in test.

mariusbuescher/grunt-w3c-html-validation,vikash-bhardwaj/grunt-w3c-html-validation,vikash-bhardwaj/grunt-w3c-html-validation,mariusbuescher/grunt-w3c-html-validation,praveenvijayan/grunt-html-validation