Merge branch 'master' into optimization

Assets/Scripts/Camera/LODTweaker.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
-using UnityEngine.Experimental.Rendering.LightweightPipeline;
 using UnityEngine.Rendering;
 
 namespace BoatAttack

Assets/Scripts/Environment/DayNightController.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
-using UnityEngine.Experimental.Rendering.LightweightPipeline;
 
 namespace BoatAttack
 {

Packages/com.verasl.water-system/Editor/PlanarSettingsDrawer.cs

 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
-using UnityEngine.Experimental.Rendering.LightweightPipeline;
+using UnityEngine.Rendering.LWRP;
 
 namespace WaterSystem
 {

Packages/com.verasl.water-system/Scripts/Data/WaterSettingsData.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
-using UnityEngine.Experimental.Rendering.LightweightPipeline;
+using UnityEngine.Rendering.LWRP;
 
 namespace WaterSystem.Data
 {

Packages/com.verasl.water-system/Scripts/MainCameraAlign.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
-using UnityEngine.Experimental.Rendering.LightweightPipeline;
 using UnityEngine.Rendering;
 
 namespace WaterSystem

Packages/com.verasl.water-system/Scripts/Rendering/PlanerReflections.cs

 using UnityEngine.Rendering;
 using WaterSystem;
 
-namespace UnityEngine.Experimental.Rendering.LightweightPipeline
+namespace UnityEngine.Rendering.LWRP
 {
     [ImageEffectAllowedInSceneView]
 

Packages/com.verasl.water-system/Scripts/Rendering/WaterFXPass.cs

 using UnityEngine;
 using UnityEngine.Rendering;
-using UnityEngine.Experimental.Rendering;
-using UnityEngine.Experimental.Rendering.LightweightPipeline;
+using UnityEngine.Rendering.LWRP;
+using UnityEngine.Experimental.Rendering.LWRP;
 
 namespace WaterSystem
 {

Packages/com.verasl.water-system/Scripts/Water.cs

 using UnityEngine;
 using UnityEngine.Profiling;
 using UnityEngine.Rendering;
-using UnityEngine.Experimental.Rendering.LightweightPipeline;
 using WaterSystem.Data;
 
 namespace WaterSystem