New rule: Disallow Symbol Constructor (no-new-symbol)

http://eslint.org/docs/2.0.0/rules/no-new-symbol

Author: feross

eslintrc.json

@@ -85,6 +85,7 @@
     "no-new-func": 2,
     "no-new-object": 2,
     "no-new-require": 2,
+    "no-new-symbol": 2,
     "no-new-wrappers": 2,
     "no-obj-calls": 2,
     "no-octal": 2,