[FEATURE] Move coherent commands on one line
[FEATURE] Explain »blame« window
[FEATURE] Move commit command up
[FEATURE] Removed deprecated tracking option

Remove --set-upstream (deprecated) and use --track instead

Thanks to @markusfalk who reported the issue

Refs #2
[FEATURE] Show merge status of branches

Refs #3
[FEATURE] Description for branch deletion options
[BUGFIX] Remove duplicated command
[FEATURE] Move commands on one line
[FEATURE] Add hint how to undo a merge
[TASK] NL