Added tree block textures, added new ItemBlockMetadata class, updated Animalia.java to use the new class.

	modified:   common/animalia/common/Animalia.java
	new file:   common/animalia/common/block/ItemBlockMetadata.java
	new file:   resources/mods/animalia/textures/blocks/leaves_cordaites.png
	new file:   resources/mods/animalia/textures/blocks/leaves_cordaites_opaque.png
	new file:   resources/mods/animalia/textures/blocks/leaves_lepidodendron.png
	new file:   resources/mods/animalia/textures/blocks/leaves_lepidodendron_opaque.png
	new file:   resources/mods/animalia/textures/blocks/leaves_sigillaria.png
	new file:   resources/mods/animalia/textures/blocks/leaves_sigillaria_opaque.png
	new file:   resources/mods/animalia/textures/blocks/sapling_cordaites.png
	new file:   resources/mods/animalia/textures/blocks/sapling_lepidodendron.png
	new file:   resources/mods/animalia/textures/blocks/sapling_sigillaria.png
	new file:   resources/mods/animalia/textures/blocks/tree_cordaites.png
	new file:   resources/mods/animalia/textures/blocks/tree_lepidodendron.png
	new file:   resources/mods/animalia/textures/blocks/tree_sigillaria.png
	new file:   resources/mods/animalia/textures/blocks/tree_top_cordaites.png
	new file:   resources/mods/animalia/textures/blocks/tree_top_lepidodendron.png
	new file:   resources/mods/animalia/textures/blocks/tree_top_sigillaria.png
	new file:   resources/mods/animalia/textures/blocks/wood_cordaites.png
	new file:   resources/mods/animalia/textures/blocks/wood_lepidodendron.png
	new file:   resources/mods/animalia/textures/blocks/wood_sigillaria.png