Add a button to `git blame` the `sha^` (parent commit) on each commit on a `git blame` page.
Note: This feature was integrated (in a prettier way) into GitHub as of Jan 20 2017.
https://github.com/blog/2304-navigate-file-history-faster-with-improved-blame-view
Add a button to git blame the sha^ (parent commit) on each commit on a git blame page.

https://github.com/Zren/ResizeYoutubePlayerToWindowSize/blob/master/changelog.md
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