Twitter bot can search for something and tweet

Twitter bot created to search for queries, selects certain results and
tweet/re-tweet random out of it.

By default it queries for `#ThoughtOfTheDay`, takes first 50 tweets from
the results and then re-tweets random any one from the result set.

Twitter bot can also take options like-
`query` (String),
`limit` (Integer), and
`new_tweet` (Boolean).

Example:
Twitter::Bot.new query: "#rails", limit: 100, new_tweet: true
rake twitter_bot:run

Task added to run twitter bot
Rake task can take options