v2.0 ProceduralParts for KSP 1.8.1, 1.9

1.3.19.1 Features, built for KSP 1.8.1 and 1.9. See 1.3.19.1 release notes.

Significant Rewrite of ProceduralParts, introduces Textures Unlimited support!

Pre-release updated 22 FEB 2020

Despite the major internal changes, this release is backwards compatible with existing craft files, saves, and the previous method of defining the textures (so existing texture packs still work).

DRAFT Changelog (Updating as I have time):

Many new Textures with TU support
Reworked part initialization process (Awake/Load/Start, etc)
Fix incorrect drag cubes on root node, particularly during reverts
Redesigned to use UI Editor callbacks instead of detecting changes in Update cycles
Removed minVolume handling, and aspect ratio handling
Completely redesigned attachment node handling.
Add 1.7 PAW group features