Installs nexmon on Raspberry Pi 3 Model B

to run installer:
bash pimon.sh

to run nexutil:
sudo su
nexutil

to run after reboot:
get to nexmon/patches/bcm43438/7_45_41_26/nexmon
sudo su
rmmod brcmfmac # removes regular broadcom driver module
insmod brcmfmac/brcmfmac.ko # installs new driver module
nexutil -m2 # places WiFi into monitor mode

to revert back to managed mode and use regular wifi:
get to the same folder as above
rmmod brcmfmac/brcmfmac.ko
modprobe brcmfmac
exit # exits su