Added add/subtract by Vector methods to Location, thanks to erisdiscord

By: Nathan Adams <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/Location.java

@@ -231,6 +231,20 @@ public class Location implements Cloneable {
         z += vec.z;
         return this;
     }
+ 
+     /**
+     * Adds the location by a vector.
+     * 
+     * @see Vector
+     * @param vec Vector to use
+     * @return the same location
+     */
+    public Location add(Vector vec) {
+        this.x += vec.getX();
+        this.y += vec.getY();
+        this.z += vec.getZ();
+        return this;
+    }
 
     /**
      * Adds the location by another. Not world-aware.
@@ -266,6 +280,20 @@ public class Location implements Cloneable {
         z -= vec.z;
         return this;
     }
+ 
+     /**
+     * Subtracts the location by a vector.
+     * 
+     * @see Vector
+     * @param vec The vector to use
+     * @return the same location
+     */
+    public Location subtract(Vector vec) {
+        this.x -= vec.getX();
+        this.y -= vec.getY();
+        this.z -= vec.getZ();
+        return this;
+    }
 
     /**
      * Subtracts the location by another. Not world-aware and