Visualize commit history in the style of Github's contribution tracker.
To use, put the executable in your path. Git will recognize it, so you can type
git calendar instead of git-calendar if you want.
$ git calendar --email "*"
Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul
..1..................................2...........1..
Mon ..1............................1......X.............
..1...............2.....3...........................
Wed 3..9.................................1...........51..
4..2......................3......................1...
Fri 81.............1.2.1...............1.......1.....2..
X...3..............................1.............9..