Twitter/Mavericks fixes

JSON is required now, run bundle install

Timestamp option for LastFM songs

2.1 build 4, Gemfile fix and max image size increase

Fix for Twitter retweets, now part of user_timeline in API

Another stupid fix. Sorry.

Quick fix for Twitter missing credentials on first run

v2.1.0.0 including oAuth for Twitter

Updated readme, minor bugfixes

BlogLogger and GaugesLogger updates, version bump to 2.0.18.0