Raise3D N2/N2+ Front Mounted Blower Fan for Left Extruder

Made some changes to Firesped's bracket to suit my needs. Uploading in case others have similar wants.

Modifications from https://www.thingiverse.com/thing:2089681:

-Moved the duct and shortened it to aim more at the left nozzle instead of being between them (I rarely use right nozzle).
-Used Toby's duct (http://www.thingiverse.com/thing:1355622, I liked its airflow and taller socket for the fan) and repaired the gap in the model.
-Slightly reduced the size of the fan socket for easier f