Make arrows point from child to master
Make arrows point from child to master

This is an important point from a Git perspective, and I shouldn't have
had them flipped in the first place. In Git, a commit has no concept of
its children; it contains a pointer to its parent(s), and that's it.

alexander-bauer/git-log-to-tikz.py,alexander-bauer/git-log-to-tikz.py