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).

.jshintrc

@@ -1,26 +1,32 @@
 {
+	// Enforcing
+	"bitwise": true,
 	"camelcase": true,
 	"curly": true,
 	"eqeqeq": true,
+	"forin": false,
 	"immed": true,
 	"latedef": true,
 	"newcap": true,
 	"noarg": true,
 	"noempty": true,
 	"nonew": true,
+	"onevar": true,
 	"quotmark": "single",
+	"regexp": false,
+	"strict": true,
 	"trailing": true,
 	"undef": true,
 	"unused": true,
-	"onevar": true,
-	"bitwise": true,
-	"forin": false,
-	"regexp": false,
-	"strict": true,
+
+	// Relax
 	"laxbreak": true,
-	"smarttabs": true,
 	"multistr": true,
+	"smarttabs": true,
+
+	// Environment
 	"browser": true,
+
 	"predef": [
 		"_",
 		"jQuery",