Add JSHint support.

Add package.json with check and lint commands to run jshint using .jshintrc.

.gitignore

@@ -0,0 +1 @@
+/npm-debug.log

.jshintrc

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+{
+    "bitwise": true,
+    "browser" : true,
+    "camelcase": true,
+    "curly": true,
+    "eqeqeq": true,
+    "indent": 4,
+    "jquery" : true,
+    "latedef": true,
+    "maxerr": 50,
+    "noarg": true,
+    "node" : true,
+    "noempty": true,
+    "plusplus": false,
+    "regexp": true,
+    "strict": false,
+    "trailing": true,
+    "unused": true
+}

package.json

@@ -0,0 +1,6 @@
+{
+    "scripts": {
+        "check": "jshint .",
+        "lint": "jshint ."
+    }
+}