Replaced scrolling widget with new angular directive and simplified approach to endless scroll. Fixed non-response to job failing before any job_events actually received. Now if playbook run completely fails, the stdout gets displayed without having to refresh browser.
Fixed endless scroll, both up and down. It now models the Jenkins behavior. If live events are happening, it captures and displays them, always auto-scrolling down. If user srolls up, live events continue to be captured but auto-scrolling is suspended. If user scrolls all the way back down to bottom, auto-scrolling resumes.
Safari's DOMParser object does not support parsing HTML. When the app initializes we now detect the browser type and define $rootScope.browser accordingly. If the browser is Safari, then we do some ugly looping and regex'ing to separate out the html and style sheet from the stdout API response.
