Move jshint config into a separate file

It seems better for clarity to store different things in different places.
package.json is already a big and complicated file, and .jshintrc is
a special file precisely for storing this configuration.

Not to mention that jshint authors themselves have switched away
from using jshintConfig key:
jshint/jshint@91bf14d

.jshintrc

@@ -0,0 +1,54 @@
+{
+    "bitwise": true,
+    "camelcase": false,
+    "curly": true,
+    "eqeqeq": true,
+    "forin": true,
+    "freeze": true,
+    "immed": true,
+    "latedef": true,
+    "maxlen": 150,
+    "newcap": true,
+    "noarg": true,
+    "nonbsp": true,
+    "nonew": true,
+    "plusplus": true,
+    "trailing": true,
+    "undef": true,
+    "unused": true,
+
+    "strict": false,
+
+    "asi": false,
+    "boss": false,
+    "debug": false,
+    "eqnull": false,
+    "esnext": false,
+    "evil": false,
+    "expr": false,
+    "funcscope": false,
+    "globalstrict": false,
+    "iterator": false,
+    "lastsemic": false,
+    "laxbreak": true,
+    "laxcomma": false,
+    "loopfunc": false,
+    "multistr": false,
+    "notypeof": false,
+    "proto": false,
+    "scripturl": false,
+    "smarttabs": false,
+    "shadow": false,
+    "sub": false,
+    "supernew": false,
+    "validthis": false,
+    "noyield": false,
+
+    "browser": true,
+    "node": true,
+
+    "nomen": false,
+    "onevar": true,
+    "passfail": false,
+    "white": false
+}

package.json

@@ -71,60 +71,6 @@
         "jshint": "2.5.x",
         "requirejs": "2.x",
         "coveralls": "2.x"
-    },
-    "jshintConfig": {
-        "bitwise": true,
-        "camelcase": false,
-        "curly": true,
-        "eqeqeq": true,
-        "forin": true,
-        "freeze": true,
-        "immed": true,
-        "latedef": true,
-        "maxlen": 150,
-        "newcap": true,
-        "noarg": true,
-        "nonbsp": true,
-        "nonew": true,
-        "plusplus": true,
-        "trailing": true,
-        "undef": true,
-        "unused": true,
-
-        "strict": false,
-
-        "asi": false,
-        "boss": false,
-        "debug": false,
-        "eqnull": false,
-        "esnext": false,
-        "evil": false,
-        "expr": false,
-        "funcscope": false,
-        "globalstrict": false,
-        "iterator": false,
-        "lastsemic": false,
-        "laxbreak": true,
-        "laxcomma": false,
-        "loopfunc": false,
-        "multistr": false,
-        "notypeof": false,
-        "proto": false,
-        "scripturl": false,
-        "smarttabs": false,
-        "shadow": false,
-        "sub": false,
-        "supernew": false,
-        "validthis": false,
-        "noyield": false,
-
-        "browser": true,
-        "node": true,
-
-        "nomen": false,
-        "onevar": true,
-        "passfail": false,
-        "white": false
     }
 }