add new functionality custom_commands in README
add new functionality custom_commands in README

Signed-off-by: Robert Ressl <0cf821cfbcab2934a7817cb73e6b9ebd1cce9857@safematix.com>

bcg62/sudo,autarchprinceps/sudo,autarchprinceps/sudo,opscode-cookbooks/sudo,juliandunn/sudo,chef-cookbooks/sudo,opscode-cookbooks/sudo,cringdahl/sudo,chef-cookbooks/sudo,juliandunn/sudo,opscode-cookbooks/sudo,cringdahl/sudo,bcg62/sudo