Fix collision glitch with half drawers

gradle.properties

@@ -1,5 +1,5 @@
 minecraft_version=1.8
 forge_version=1.8-11.14.3.1449
-mod_version=2.1.2
+mod_version=2.1.3
 chameleon_version=0.1.0
 chameleon_max_version=1.0.0

src/com/jaquadro/minecraft/storagedrawers/block/BlockDrawers.java

@@ -128,6 +128,11 @@ public int getLightOpacity (IBlockAccess world, BlockPos pos) {
             return 255;
     }
 
+    @Override
+    public boolean isFullCube () {
+        return false;
+    }
+
     @Override
     public boolean isOpaqueCube () {
         return false;