Make ImgurLinks a submodule of LinkInfo
Move title grabbing to a LinkInfo plugin
Add a LinkHandler type to encapsulate the predicate and handler
Specify in the configuration which LinkInfo plugins to enable
Don't display empty linkinfo
Shamelessly steal Alan's title similarity metric from csbot
Implement Youtube LinkInfo. Closes #6
Add Soundclound plugin. Closes #8.
Merge branch 'better-linkinfo'