The demos don't need to be animated - the user wouldn't miss anything
if they skipped to the end. So let's just show the full output so the
user can read through it at their own pace. We could use plain text,
but I think the colors are helpful, so I went with screenshots.
Closes#166.
The default log output of showing all commits is not very useful when
contributing to an existing repo. Let's have it default to showing
commits not on any remote branch instead. I think that's the best we
can do since we don't have a configurable main branch yet, and we
don't even have per-repo configuration..
Closes#250.
