Add blame support

[kevinsawicki]

libgit2/libgit2#1317

[jasisk]

Would love to see this. Building a blame view that colors the gutter by recency.

[DeTeam]

👍

[baer]

+1

I'm working on a 25k line codebase and I use blame a lot to find who I can talk to about a feature.

[juanpaulo]

👍
(git) blaming helps resolve conflicts.