Twitter API integration squash

/api/twitter/search/YOUR_SEARCH_HERE/num_tweets

/api/twitter/username/USERNAME/num_tweets

/api/twitter/hashtag/HASHTAG/num_tweets
Weather JSON not relevant to twitter branch
memory-cache
Twitter fixes
Twitter fixes
Merge branch 'los-nudos-twitter-api'

Conflicts:
	package.json
	server.js