Extra slabs (granite, diorite, andesite)

Needs custom texture though.

src/resources/assets/mmm/lang/en_US.lang

@@ -1,13 +1,21 @@
-tile.mmm.deco.table.oak.name=Oak table
-tile.mmm.deco.table.birch.name=Birch table
-tile.mmm.deco.table.spruce.name=Spruce table
-tile.mmm.deco.table.acacia.name=Acacia table
-tile.mmm.deco.table.jungle.name=Jungle wood table
-tile.mmm.deco.table.dark_oak.name=Dark oak table
+tile.mmm.deco.stairs.granite.name=Granite Stairs
+tile.mmm.deco.stairs.diorite.name=Diorite Stairs
+tile.mmm.deco.stairs.andesite.name=Andesite Stairs
 
-tile.mmm.deco.chair.oak.name=Oak chair
-tile.mmm.deco.chair.birch.name=Birch chair
-tile.mmm.deco.chair.spruce.name=Spruce chair
-tile.mmm.deco.chair.acacia.name=Acacia chair
-tile.mmm.deco.chair.jungle.name=Jungle wood chair
-tile.mmm.deco.chair.dark_oak.name=Dark oak chair
+tile.mmm.deco.slabs.granite.name=Granite Slab
+tile.mmm.deco.slabs.diorite.name=Diorite Slab
+tile.mmm.deco.slabs.andesite.name=Andesite Slab
+
+tile.mmm.deco.table.oak.name=Oak Table
+tile.mmm.deco.table.birch.name=Birch Table
+tile.mmm.deco.table.spruce.name=Spruce Table
+tile.mmm.deco.table.acacia.name=Acacia Table
+tile.mmm.deco.table.jungle.name=Jungle Wood Table
+tile.mmm.deco.table.dark_oak.name=Dark Oak Table
+
+tile.mmm.deco.chair.oak.name=Oak Chair
+tile.mmm.deco.chair.birch.name=Birch Chair
+tile.mmm.deco.chair.spruce.name=Spruce Chair
+tile.mmm.deco.chair.acacia.name=Acacia Chair
+tile.mmm.deco.chair.jungle.name=Jungle Wood Chair
+tile.mmm.deco.chair.dark_oak.name=Dark Oak Chair