Add line-summary as an options --line  & doc
Letter spacing in author list

This is a quick fix for the letter spacing for the author list.
Merge pull request #224 from StewartJarod/patch-1

Letter spacing in author list.
Merge pull request #221 from zlx/feature/git-summary-doc

Make line-summary as sub-command.
Uses column -t to align summary output in a table.
Merge pull request #236 from jbnicolai/align-authors-git-summary

Uses column -t to align summary output in a table.