Merge topic 'improve_dev_guide'

1920a2ed Doc: fix bad username for mathieu
370338e3 Doc: remove former keu employees from the list of reviewer

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Reviewed-by: Mathieu Westphal (Kitware) <mathieu.westphal@kitware.com>
Reviewed-by: Nicolas Vuaille <nicolas.vuaille@kitware.com>
Merge-request: !10700