Changed block organisation...

Let's try again..

Changed the way blocks were textured, now sorted by category (Metal
block under ore etc.)
Changed block textures within BlocksHelper.java to correspond to png
Added machine texture sheet for Lava Furnace
Added giu folder with LF GUI texture
Added new texture sheets to TextureHandler.java
Added to Idead.md
Merge pull request #40 from cman8396/master

Changed block textures...