Add more information to pull request view
Add more information to pull request view

This adds if the PR is mergeable.  If it was merged it adds who merged
it, what time, and the merge commit.

[510d74b69d9d43b60b6f6aa9d95e9f9c9497f815@docker.com: rebased and resolved merge conflicts]
Signed-off-by: Solomon Hykes <510d74b69d9d43b60b6f6aa9d95e9f9c9497f815@docker.com>

fmoliveira/gordon,docker/gordon,fmoliveira/gordon,fmoliveira/gordon,fmoliveira/gordon,docker/gordon,docker/gordon,docker/gordon