Feature request: Progress bars

[ListenerJubatus]

Would it be possible to have markup for creating progress bars in pages? We were planning on using them in particular for a documentation page that contains feature roadmap and implementation progress.

[xoxys]

Thanks for your request. We have a progress bar short code already implemented in the hugo-geekblog theme. What do you think about it? If that works for your use case already, we can easily add it to hugo-geekdoc as well.

[ListenerJubatus]

Yeah that would be perfect!

[xoxys]

Added via #594