Revo to abbn (#469)

* initial commit of E3D REVO hotends

* Update AB-BN-30_Hotend-Zodiac_BMO_front.stl

stl was not laying flat on bed..

printer_mods/Badnoob/AB-BN/Readme.md

@@ -64,6 +64,8 @@ This version of the afterburner fan and duct is a drop in replacement to the spe
 \* Cleaner airflow for better overhangs
 
 ### CHANGE Log
+Added support for E3D REVO hotend 
+
 Added support for Zodiac BMO and BMS
 
 Removed support for Slice.
@@ -126,6 +128,10 @@ Everyone will need:
 
   ##### Depending on your hotend you will need:
   
+  ##### E3D REVO
+* AB-BN-30_Hotend-E3D_REVO-front.stl
+* AB-BN-30_Hotend-E3D_REVO-back.stl
+
   ##### Phaetus BMS:
 * AB-BN-30_Hotend-Phaetus_BMS-front.stl
 * AB-BN-30_Hotend-Phaetus_BMS-back.stl