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
Changed festival timestamps to ISO dates
Changed timestamp to ISO dates in README
functional rotten tomatoes integration
Merge pull request #32 from Noemj/bugfix/timestamp

Changed festival timestamps to ISO dates
Only allow GET, OPTIONS and HEAD -requests to REST-api
Merge pull request #33 from Hilzu/dev

Only allow GET, OPTIONS and HEAD -requests to REST-api
README
Even more documentation fixes
Merge pull request #35 from Hilzu/doc-fixes

Even more documentation fixes
Hidden __v field
Merged Twitter branch
Use API version in url
Added API for queriyng model schema
Merge pull request #37 from Hilzu/schema-interface

Schema interface
Merge pull request #38 from los-nudos/twitter

Twitter API implementation
weather API
documentation, typo fix