Makeblock mElephant E3D Titan extruder mount

This is mount for [E3D Titan Extruder](https://e3d-online.com/titan-extruder) on Makeblock mElephant 3D printer. Mount is opt-in - no additional modifications for the printer are required except 4 shorter M4 bolts to hold the mount. In general I'm very happy with this E3D upgrade.

Additionally [https://www.thingiverse.com/thing:1571526](E3D Titan Extruder Fan Mount for Prusa i3) can be used.

# CHANGELOG

### Version 1
Version 1 was made with OpenSCAD. Multiple issues were detected after v1 which were fixed v2. Contact me if you'd like to get scad file of v1.

### Version 2 (current)
- Raised extruder vertically to save height on Y axis.
- Shifted extruder to the left side a bit so E3D v6 heat sink would not cover mounting bolts. Additionally this centered prints a bit.
- Moved extruder back because noozle was moving out of bed when z-axis was at home position.
- Mount made more robust to reduce vibrations.

# TODO
- Increase sizes of holes for bolts and leveling senso