Make ring/chevron block available as a beacon base (#11)

Author: MadMan310

src/main/java/gcewing/sg/SGRingBlock.java

@@ -200,4 +200,8 @@ else if (te.basePos.equals(bp))
         }
     }
 
+    @Override
+    public boolean isBeaconBase(IBlockAccess worldObj, int x, int y, int z, int beaconX, int beaconY, int beaconZ) {
+        return true;
+    }
 }