[feature] Ask paco for weather info

[memosstilvi]

It would be nice if paco could return weather information for a given location.

Usage:

• question: paco weather California
• answer: 25 degrees sunny

sth along these lines..

[steliospapagrigoriou]

maybe https://github.com/github/hubot-scripts/blob/master/src/scripts/weather.coffee ?

[memosstilvi]

@steliospapagrigoriou Looks good! I wiill integrate it. :)