Added jsdoc tags to Gruntfile.js
Added jsdoc tags to Gruntfile.js for grunt-test/grunt-init-node
Added jsdoc tags to Gruntfile.js for grunt-test/grunt-init-jquery
Added jsdoc tags to Gruntfile.js for grunt-init-basic-nodom-nomin
Added jsdoc tags to Gruntfile.js for grunt-test/grunt-init-basic-dom-min
Added jsdoc tags to Gruntfile.js for jshint, less, csslint, lint5 for css-test