Installation:

1)  take 6p with any OS
2)  download all files from https://build.nethunter.com/contributors/re4son/angler/
3)  flash angler-n4f26u-factory-131d7b01.zip from local fastboot directory, e.g.:
    cd Android\Sdk\platform-tools\
    flash-all.bat
4)  flash twrp-3.3.0-0-angler.img from fastboot, e.g:
     cd Android\Sdk\platform-tools\
     fastboot flash recovery twrp-3.3.1-0-angler.img
5)  Copy:
     lineage-14.1-20180219-nightly-angler-signed.zip
     vendor-n2g48c.img
     nethunter image
     to USB stick
6)  insert USB stick and reboot bootloader, do not reboot into system - reboot into bootloader
7)  boot into twrp recovery
8)  Wipe->Advanced->wipe everything EXCEPT "Internal Storage"
9)  return to "Install" menu
10) flash vendor-n2g48c.img
11) flash lineage-14.1-20180219-nightly-angler-signed.zip
12) reboot system, start Android, make start settings, poweroff
13) go to twrp recovery
14) flash nethunter image
15) reboot sysytem
16) run NH app