ZA - Better amethyst

• Small Resonant experience crystal visual fix.

• Added Experience resonance crystal(xp storage)

• Updated resonant core
• Updated amethyst blocks textures

• First public version

Content:

• Amethyst(and shiny amethyst) pillars, bricks, slabs, stairs, chissled amethyst.
• Resonant core.
• Amethyst tools and amethyst upgrade.
• Runes