date color

[Anonymous142]

https://github.com/alexcorre/git-blame/blame/8308a69652d80d7872663e1ba7a58c146c25e175/package.json

github git-blame support..

1. color
   with color orange, it shows the specific lines' age (newer / older).
   a package is supporting this.

2. position
   github's blame is located left side. even more left than line number.

if this package support this 2 by option, it would be very good.
thank you.