wget http://selenium-release.storage.googleapis.com/2.44/selenium-server-standalone-2.44.0.jar
java -jar selenium-server-standalone-2.44.0.jar
wget https://sites.google.com/a/chromium.org/chromedriver/
java -jar selenium-server-standalone-2.44.0.jar -Dwebdriver.chrome.driver=~/Downloads/chromedriver
./bin/screenshot screenshot:run myscript.json