Fixes anchor rendering (#2698)

* Fixes #2680: Use a shorter cable anchor model when blocked by a facade.
* Fixes #2664: Prevent anchors from creating intersection.

Replaced the simple List<ResourceLocation> for the static models with a
new container also indicating a solid part, which can be used to prevent
the creation of an intersection.

src/main/java/appeng/core/AppEng.java

@@ -22,6 +22,7 @@ package appeng.core;
 import java.io.File;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
+
 import javax.annotation.Nonnull;
 
 import com.google.common.base.Stopwatch;