Recovered property accessor in encoding.js (Resolves inexorabletash#67)

Fixed issue described in inexorabletash/issues/67
The problem was casued by the missing propery accessor on the
require statement, which passed the entire global scope of
`encoding-indexes` instead of the indexes.

Author: therufa

lib/encoding.js

@@ -11,7 +11,8 @@
   // If we're in node require encoding-indexes and attach it to the global.
   if (typeof module !== "undefined" && module.exports &&
     !global["encoding-indexes"]) {
-    global['encoding-indexes'] = require("./encoding-indexes.js");
+    global["encoding-indexes"] =
+      require("./encoding-indexes.js")["encoding-indexes"];
   }
 
   //