v0.8

• Add chart "commits_day".
• Rename chart "commits_hour" to "commits_hour_day" and "commits_day" to "commits_day_week".
• Add option -s/--sort-max.
• Rename option -m/--max to -d/--max-diff.

v0.7

• Fix chart title.

v0.6

• Add a main function.

v0.5

• Make options title/repository optional.
• Add option -m/--max.
• Display SVG on standard output if filename is "-".

v0.4

• Add PNG support.

v0.3

• Fill months without commits (set value to 0) in chart "commits_year_month".

v0.2

• Read all data on standard input (no more limit at 1MB).
• Add missing argument "title" in help.

v0.1

First release.