Diveboard / OpenDive Comprehensive Lens Overhaul

# Diveboard / OpenDive Comprehensive Lens Overhaul
## Summary
A comprehensive overhaul of lens holders and clips compatible with the Diveboard / OpenDive design.
## The Lens Holders
The original OpenDive lens design, while it allowed the flexibility to specifically manipulate the lens for each eye, was exceedingly difficult to precisely setup and to maintain lens position. [frma71](http://www.thingiverse.com/frma71/about) made significant improvements to these parts by designing a [sing