How to Restart Web Server After Google App Engine Launcher Crash

1. Open a terminal window.
2. Copy and paste this: sudo lsof -i -n -P | grep TCP
3. Take note of the process id (PID) currently listening on the port your app was running on (look for something that looks like: TCP 127.0.0.1:8080 (LISTEN)).
4. Open Activity Monitor.
5. Sort the processes list by PID.
6. Kill the process matching the PID you noted in step 3.
7. Restart your server from Google App Engine Launcher.

Thanks to irs8925 for providing the answer on Stack Overflow.

Installing Phonegap plugins

Putting this example of installing Phonegap plugins here for myself as reference...

Example using Plugman (for Native workflow; entered from anywhere):

plugman install --platform ios --project ./Phonegap/ios/beepwatch2/platforms/ios --plugin org.apache.cordova.splashscreen

Example using Cordova (for Global workflow; entered from project folder):

cordova plugin add org.apache.cordova.inappbrowser