Cooler, Blower, Fan, i3 Hephestos

This is a remix of ubits blower (http://www.thingiverse.com/thing:683604) and McVillano blower (http://www.thingiverse.com/thing:717408) for bq Prusa i3 Hephestos.

I had the problem that the cables from the heating cartridge touched the cooler. Therefore, the material of the fan melted and the air flow was disturbed. This led to poor printing results. The cooling ring is now wider and provides enough space for the Hotend and the cables.

Furthermore, the auto bed leveling mount has been ada