Add note about --recursive in docs.
Add note about --recursive in docs.

ChristineLaMuse/mozillians,justinpotts/mozillians,brian-yang/mozillians,chirilo/mozillians,anistark/mozillians,brian-yang/mozillians,johngian/mozillians,anistark/mozillians,akarki15/mozillians,safwanrahman/mozillians,ChristineLaMuse/mozillians,johngian/mozillians,chirilo/mozillians,safwanrahman/mozillians,fxa90id/mozillians,justinpotts/mozillians,mozilla/mozillians,johngian/mozillians,hoosteeno/mozillians,chirilo/mozillians,mozilla/mozillians,safwanrahman/mozillians,justinpotts/mozillians,brian-yang/mozillians,akatsoulas/mozillians,fxa90id/mozillians,glogiotatidis/mozillians-new,akatsoulas/mozillians,hoosteeno/mozillians,akarki15/mozillians,hoosteeno/mozillians,glogiotatidis/mozillians-new,fxa90id/mozillians,glogiotatidis/mozillians-new,akatsoulas/mozillians,mozilla/mozillians,chirilo/mozillians,mozilla/mozillians,brian-yang/mozillians,johngian/mozillians,akarki15/mozillians,justinpotts/mozillians,ChristineLaMuse/mozillians,anistark/mozillians,akarki15/mozillians,hoosteeno/mozillians,anistark/mozillians,safwanrahman/mozillians,akatsoulas/mozillians,fxa90id/mozillians,glogiotatidis/mozillians-new