Updated: Quick git contributors list

Changes

    git shortlog -s -n [commit-range]
`-n`, `--numbered`
Sort output according to the number of commits per author
`-s`, `--summary`
Suppress commit descriptions, only provide commit count
`[commit-range]`
E.g. `$tagname..` for "everything after that tag"
Example output for [spreewald](https://github.com/makandra/spreewald):
    60  Tobias Kraze
    12  Henning Koch
     7  Dominik Schöler
     6  Thomas Eisenbarth
     5  Martin Straub
     3  Minh Hemmer
     2  Alex McHale
     1  Manuel Kallenbach
-     1  Andreas Robecke
+     1  Andreas Robecke
+
+## Alternatives
+
+There is a powerful CLI tool called [git who](https://github.com/sinclairtarget/git-who).
+