Parse and display Travis log folds

[DreierF]

Hi,

first of all thanks for building this awesome app! I'd like to make a proposal to make the app even more useful: It would be nice if the log display would make areas marked by travis_fold collapse/expandable like on the Web UI. This would make it a lot easier and faster to get to the relevant portion of the logs :) Also showing the color would be a nice addition. The syntax is summarized here: http://stackoverflow.com/a/30957814/4158397