If you are looking for an excuse to buy the Chromecast, this may be it. Google is offering $20 Play credit when you purchase the new Chromecast. Depending on where you buy your Chromecast, that makes it only $10-15 dollars! You can spend the credit on movies, apps, music albums, and more. To redeem, simply download the Chromecast app, from the left menu bar click “offers”.…