Add tags support

[jiulongw]

Credits to @a-urth PR #8

However, I feel the footprint of his tag implementation doesn't fit hemingway's minimalist style. So I did some modification and try to keep it as close to current feeling as possible.

A live demo can be found here: https://jiulongw.github.io/

Hope this would be useful to others who like this theme but need tag support!

[a-urth]

Yeah, this looks just amazing! My goal was just to implement tags asap)

[ribice]

I tried merging this locally, currently getting this error:

[jiulongw]

Thanks for letting me know @ribice ! This issue happens when there is only one tag in a post. I just pushed a fix to this PR.

[ribice]

Hi,

Included these changes in a fork of mine (link). Thanks!