Ups, ok, I guess I mislead you there. No problem. Go to this link and download TWRP recovery.
http://techerrata.com/browse/twrp2/m7ul
Reboot to bootloader -> fastboot.
In your mini-sdk folder, where you have ADB installed, type:
fastboot erase cache
fastboot flash recovery nameoffile.img
Then go to recovery. In recovery you go to reboot option and when you exit it will ask you if you want to root your phone, something like that. You confirm it and it will boot to Android. There go to SuperSU and again it will ask you to download SuperSU app. You confirm it(choose TWRP option, you will see).
It will reboot to recovery, do "something" and then you are rooted.