Merge pull request #5 from natematias/master

Made code more DRY, added objects. Added Wayback machine and Describing.am
urls have funny characters (:,/ etc) and should be encoded when sent as a query string parameter.
fix herdict api (remove url scheme before fetching service data)
Add media cloud service
Merge branch 'master' of https://github.com/berkmancenter/urlopedia
ignore log files