Electron support

From https://github.com/vector-im/vector-web/pull/2511 but with
just the actual electron changes

package.json

@@ -1,8 +1,10 @@
 {
   "name": "vector-web",
+  "productName": "Riot",
+  "main": "electron/src/electron-main.js",
   "version": "0.8.4-rc.2",
-  "description": "Vector webapp",
-  "author": "matrix.org",
+  "description": "A feature-rich client for Matrix.org",
+  "author": "Vector Creations Ltd.",
   "repository": {
     "type": "git",
     "url": "https://github.com/vector-im/vector-web"
@@ -31,6 +33,7 @@
     "build:compile": "babel --source-maps -d lib src",
     "build:bundle": "NODE_ENV=production webpack -p --progress",
     "build:bundle:dev": "webpack --optimize-occurence-order --progress",
+    "build:electron": "build -lwm",
     "build": "node scripts/babelcheck.js && npm run build:emojione && npm run build:css && npm run build:bundle",
     "build:dev": "npm run build:emojione && npm run build:css && npm run build:bundle:dev",
     "dist": "scripts/package.sh",
@@ -91,6 +94,7 @@
     "catw": "^1.0.1",
     "cpx": "^1.3.2",
     "css-raw-loader": "^0.1.1",
+    "electron-builder": "^7.10.2",
     "emojione": "^2.2.3",
     "expect": "^1.16.0",
     "fs-extra": "^0.30.0",
@@ -117,5 +121,24 @@
   },
   "optionalDependencies": {
     "olm": "https://matrix.org/packages/npm/olm/olm-2.0.0.tgz"
+  },
+  "build": {
+    "appId": "im.riot.app",
+    "category": "Network",
+    "electronVersion": "1.4.2",
+    "//asar=false": "https://github.com/electron-userland/electron-builder/issues/675",
+    "asar": false,
+    "dereference": true,
+    "//files": "We bundle everything, so we only need to include vector/",
+    "files": [
+      "!**/*",
+      "electron/src/**",
+      "vector/**",
+      "package.json"
+    ]
+  },
+  "directories": {
+    "buildResources": "electron/build",
+    "output": "electron/dist"
   }
 }