Wensi's PV layer holder

This OpenSCAD script will generate a simple one piece fixture to hold a colleague's PV layer components i.e. PV cell, PCB and supercapacitor

NOTE: Before v0.7 parts of this file lie below z=0, these files will need to be moved onto the platform before printing! Be careful if you decide to print this!

I've got 30 of these guys to print!

Changes from previous versions:
2.1.0
- Variant that prints a simple 2cm tall cap to cover the electronics part of the holder
2.1
- Fixed some vl