build: Clean up Gruntfile

* Sort jshintrc a-z and section it.

* Remove grunt.js from jshintignore (file no longer exists).

* Simplify jshint config by using globstar. The jshintignore
  file still applies (to skip jquery.uls.data.js).

* Update jshint config to also validate Gruntfile.js

* Update listed dependency on 'grunt' and 'grunt-cli' to the
  versions they currently expand to already. We don't know if
  we're compatible with older versions. '^x.y' means, equal or
  higher (within the same major release). Similar to '~x.y',
  except that tilde tolerates older versions.

* Update grunt-contrib-jshint and grunt-contrib-qunit to their
  latest versions.

* Remove obsolete jshintrc parsing hack, use built-in 'jshintrc'
  option as of v0.8.0.

* Remove unused 'pgk' property in grunt config.

* Remove unused grunt-contrib-jasmine and grunt-contrib-copy
  from devDependencies (unused as of ab9b01444f).

package.json

@@ -25,12 +25,10 @@
     "Siebrand Mazeland"
   ],
   "devDependencies": {
-    "grunt": "~0.4.1",
-    "grunt-cli": "~0.1",
-    "grunt-contrib-jshint": "~0.5.4",
-    "grunt-contrib-qunit": "~0.2.1",
-    "grunt-contrib-jasmine": "~0.4",
-    "grunt-contrib-copy": ">0.0.0"
+    "grunt": "^0.4.5",
+    "grunt-cli": "^0.1.13",
+    "grunt-contrib-jshint": "^0.8.0",
+    "grunt-contrib-qunit": "^0.5.2"
   },
   "repository": {
     "type": "git",