Drawing Git Branch Graphs with gitgraphjs

Recently I have to write a PPT to share with colleages about how to use beyond compare to assist merging. To tell things clearly, I want to draw lots of git branch graphs. Using tools such as Microsoft Visio is one option, but I want a more easy way.

After some searching, I found this amazing tool: http://gitgraphjs.com/. With a few lines of javascript code, it can easily draw the following graph:

It almost satisfies all my needs, except that I want add some identification notes to the nodes, so that I can refer them clearly when presenting.

After some code modification, I successfully added a number to each node, as ire.n the following picture.

The final code is checkin to https://github.com/shawn11ZX/gitgraph.js  and the PPT is shared at slideshare