Added firewords api endpoint

Karmacracy people released in a very informal way (via twitter) a new feature to their API.

<blockquote class="twitter-tweet" lang="es"><p>Hace unos minutos, no; ahora ya si: <a href="http://t.co/bYbWWXBrRY">http://t.co/bYbWWXBrRY</a> // <a href="https://twitter.com/rlbisbe">@rlbisbe</a> <a href="https://twitter.com/karmacracy">@karmacracy</a></p>&mdash; Jordi (@itortv) <a href="https://twitter.com/itortv/statuses/409018090467241984">diciembre 6, 2013</a></blockquote>

I'm using it with my Windows 8 app, so this are my 2 cents.

I don't know the criteria followed for minifying, please let me know it :)