Modified how final lines are treated when response is parsed
LogLines tracks the difference in content length between requests
Added 'to top' and 'to bottom' buttons for logs
Fixed bug when trying to scroll to bottom
Stylistic changes
Made 'to top' button fade out if at top
Merge pull request #139 from HubSpot/issue-137-log-tailer-to-top-button

Issue 137 - Added "To Top" & "To Bottom" buttons to log files