conversion to 3d

actually had been working on this for a while.
Has mostly gone smoothly but lately there's been some issues with
scaling of the grid on the screen.
fixed many scaling issues

was using global width and height instead of the scaled equivalents.
Fixed now!
scale change
implemented scaleFactor

started to use a common scale factor to adjust 3d graphics resolution.
now must apply this to particle speeds and so on.
added reference section

explains hard-coded unit conversions. Only there while I automate the
unit-shifting/conversion process.
Tidying up, tying to SI units

Grouped likeminded code into tabs, invented functions to assist with
decluttering main body of code.

Implemented auto-conversion between SI units and simulator units
(pixels,frames), even remains correct with resolution changes! VERY
HAPPY
deleted androidManifest