net/csma_sender:Update documentation
net/csma_sender:Update documentation

Add compile time parameters to config group

RIOT-OS/RIOT,kaspar030/RIOT,authmillenon/RIOT,kaspar030/RIOT,miri64/RIOT,basilfx/RIOT,ant9000/RIOT,miri64/RIOT,basilfx/RIOT,authmillenon/RIOT,OlegHahm/RIOT,ant9000/RIOT,ant9000/RIOT,ant9000/RIOT,OTAkeys/RIOT,kYc0o/RIOT,OTAkeys/RIOT,basilfx/RIOT,authmillenon/RIOT,ant9000/RIOT,miri64/RIOT,kYc0o/RIOT,authmillenon/RIOT,OlegHahm/RIOT,miri64/RIOT,OlegHahm/RIOT,jasonatran/RIOT,basilfx/RIOT,jasonatran/RIOT,miri64/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,OTAkeys/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,kaspar030/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,OTAkeys/RIOT,kaspar030/RIOT,authmillenon/RIOT,OTAkeys/RIOT,jasonatran/RIOT,kYc0o/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,basilfx/RIOT