v2.1.0

Upgrade to selenium-server-standalone v2.53.0 and selenium-webdriver v2.47.0. You will likely need to re-download selenium-server-standalone:
```
  curl -L https://selenium-release.storage.googleapis.com/2.53/selenium-server-standalone-2.53.0.jar > bin/selenium-server-standalone.jar
```
Tear out old farming functionality, which Google broke. See hangout-farmer for a temporary workaround until we can replace Google Hangouts.

v2.0.0