Switch from es6-shim to core-js

package.json

@@ -8,6 +8,7 @@
   },
   "license": "GPL-3.0",
   "devDependencies": {
+    "@types/core-js": "^0.9.32",
     "copy-webpack-plugin": "^3.0.1",
     "gulp": "^3.9.1",
     "gulp-if": "^2.0.1",
@@ -35,18 +36,16 @@
     "@angular/platform-browser": "2.0.0-rc.6",
     "@angular/platform-browser-dynamic": "2.0.0-rc.6",
     "@angular/router": "3.0.0-rc.2",
-    "@types/es6-shim": "0.0.31",
     "@types/jquery": "1.10.31",
     "@types/node": "6.0.38",
     "bootstrap": "^3.3.7",
     "browser-stdout": "^1.3.0",
-    "es6-shim": "^0.35.1",
+    "core-js": "2.4.1",
     "font-awesome": "^4.6.3",
     "handlebars": "^4.0.5",
     "jquery": "^2.2.2",
     "json-loader": "^0.5.4",
     "ng2-select2": "0.4.2",
-    "reflect-metadata": "0.1.3",
     "rxjs": "5.0.0-beta.11",
     "select2": "^4.0.3",
     "sortablejs": "^1.4.2",