Suggestion: Additional fields for BlameResult Line struct

[TheDahv]

In light of #457, I ran across some ideas I couldn't solve with the current Line implementation.

I currently get an Author and Text field, but I'd rather have a object.Signature, or at least its equivalent baked into the Line.

The Signature I'd like because separating Name and Email are useful so I can resolve them to canonical names via a mailmap.

The When field is useful because I'd like to be able to determine which lines have been changed most recently, or which lines have grown quite stale and thus any relevant experience by the original author.

[odeke-em]

Thank you for creating this issue @TheDahv!

I too have just encountered this issue and in particular am building a license compliance tool for which I'd like to detect which files don't have the appropriate license headers and be able to do a git-blame on the offending files and figure out the earliest date that the file was added and then use that year for the license entry.

[ghost]

This should be easy enough to implement after looking at the blame.go file. Should/could we pass back the entire commit object?