try to improve scrolling experience
Only scroll when at the bottom of the buffer

I think this behaviour is a lot more natural. Because it no longer "scrolls to bottom", I also renamed it.
Fix scrolling behaviour for good (?)
Merge pull request #109 from lorenzhs/scrolling

Improve scrolling
embed youtube over SSL
Merge pull request #116 from lorenzhs/youtubeSSL

embed youtube over SSL