2.1 Update - synchronize assets with project palette

Features:

• (Edit/Set Project Palette) Allow to map colors for whole palette. Sprite must use those colors.
• (Edit/Import Color Sets) Imports color re-maping from other projects. Must be using same project palette.
• Shader example for Unity.

Recorded walkthrough video of synchronizing assets to match project palettes and be able to use same generated color sets (re-mapped colors) with shaders.