Updated package.json tasks

Author: Darkle

package.json

@@ -10,9 +10,10 @@
     "start": "gulp",
     "initialSetup": "npm install && bower install && npm run rebuildSqliteForElectron",
     "rebuildSqliteForElectron": "electron-rebuild -f -w sqlite3",
-    "packageosx": "cross-env NODE_ENV=production gulp packageosx",
+    "packageosx": "cross-env NODE_ENV=production gulp packageosx && npm run createDMG",
     "packagewin64": "cross-env NODE_ENV=production gulp packagewin64",
-    "packagelinux64": "cross-env NODE_ENV=production gulp packagelinux64"
+    "packagelinux64": "cross-env NODE_ENV=production gulp packagelinux64",
+    "createDMG": "appdmg InstallationMediaMetadata/node-appdmg.json packagesForPlatforms/MarkSearch-darwin-x64/MarkSearch.dmg"
   },
   "dependencies": {
     "axios": "^0.15.2",
@@ -61,6 +62,7 @@
   },
   "devDependencies": {
     "appdirectory": "^0.1.0",
+    "appdmg": "^0.4.5",
     "babel-polyfill": "^6.5.0",
     "babel-preset-es2015": "^6.5.0",
     "babelify": "^7.3.0",