add downloads folder - fix #53

- fixed issue where nothing but infoHash was getting saved
- better defaults mgmt for state.saved
- no duplicates saved

package.json

@@ -24,7 +24,8 @@
     "pretty-bytes": "^3.0.0",
     "upload-element": "^1.0.1",
     "virtual-dom": "^2.1.1",
-    "webtorrent": "^0.82.1"
+    "webtorrent": "^0.82.1",
+    "xtend": "^4.0.1"
   },
   "devDependencies": {
     "electron-packager": "^5.0.0",