Update bower.json for Polymer elements and add PRESUBMIT.py

third_party/polymer/v1_0/components/iron-iconset-svg/bower.json

 {
   "name": "iron-iconset-svg",
   "description": "Manages a set of svg icons",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "keywords": [
     "web-components",
     "polymer",
     "icon"
   ],
   "license": "http://polymer.github.io/LICENSE.txt",
   "private": true,
   "authors": [
     "The Polymer Authors"
   ],
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/PolymerElements/iron-iconset-svg.git"
+  },
   "dependencies": {
     "polymer": "polymer/polymer#^1.0.0",
     "iron-meta": "polymerelements/iron-meta#^1.0.0"
   },
   "devDependencies": {
     "paper-styles": "polymerelements/paper-styles#^1.0.2",
     "iron-component-page": "polymerelements/iron-component-page#^1.0.0",
     "iron-icon": "polymerelements/iron-icon#^1.0.0",
     "test-fixture": "polymerelements/test-fixture#^1.0.0",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0",
     "web-component-tester": "*"
   }
 }