Duuk's Dungeons beta 0.26

Reworked file naming to be less arbitrary.

Fixed a bug caused by Catharsis changing their pack format (without updating their documentation for it...)

New Textures

• Critter Capsules now resemble Pokeballs
• Oak signs
• Painting backing

Changes

• Wool, Glass and Snow are more cohesive with the pack
• Darkened most Quartz blocks and added a gradient