Load babel/polyfill correctly

We need to load this since the babel runtime can’t detect when an
instance method is being used that needs to be polyfilled. So we have
to require the polyfill once, and move the `babel` dependency out of
devDependencies and into production. Closes #11

build/src/adapters/Mongoose/MongooseAdapter.js

@@ -45,8 +45,6 @@ var LinkObject = _interopRequire(require("../../types/LinkObject"));
 
 var APIError = _interopRequire(require("../../types/APIError"));
 
-var polyfill = _interopRequire(require("babel/polyfill"));
-
 var MongooseAdapter = (function () {
   function MongooseAdapter(models, inflector, idGenerator) {
     _classCallCheck(this, MongooseAdapter);

build/src/steps/do-query/do-get.js

@@ -8,10 +8,6 @@ var APIError = _interopRequire(require("../../types/APIError"));
 
 var arrayContains = require("../../util/arrays").arrayContains;
 
-var polyfill = _interopRequire(require("babel/polyfill"));
-
-//needed for string instance methods.
-
 module.exports = function (requestContext, responseContext, registry) {
   var type = requestContext.type;
   var adapter = registry.adapter(type);

index.js

@@ -1,3 +1,5 @@
+require('babel/polyfill');
+
 module.exports = {
   adapters: {
     Mongoose: require('./build/src/adapters/Mongoose/MongooseAdapter')

package.json

@@ -13,6 +13,7 @@
   },
   "main": "index.js",
   "dependencies": {
+    "babel": "4.7.x",
     "babel-runtime": "4.7.x",
     "express": "4.x.x",
     "co": "4.5.x",
@@ -26,7 +27,6 @@
     "negotiator": "0.5.x"
   },
   "devDependencies": {
-    "babel": "4.7.x",
     "babel-eslint": "2.x.x",
     "eslint": "^0.x.x",
     "chai": "~1.9.0",

src/adapters/Mongoose/MongooseAdapter.js

@@ -10,7 +10,6 @@ import Collection from "../../types/Collection";
 import Linkage from "../../types/Linkage";
 import LinkObject from "../../types/LinkObject";
 import APIError from "../../types/APIError";
-import polyfill from "babel/polyfill";
 
 export default class MongooseAdapter {
   constructor(models, inflector, idGenerator) {

src/steps/do-query/do-get.js

@@ -1,6 +1,5 @@
 import APIError from "../../types/APIError";
 import {arrayContains} from "../../util/arrays";
-import polyfill from "babel/polyfill"; //needed for string instance methods.
 
 export default function(requestContext, responseContext, registry) {
   let type    = requestContext.type;