Optimize GC for mesh wrapper.

Assets/Cryville/Crtr/Components/SectionalGameObject.cs

@@ -106,6 +106,7 @@ namespace Cryville.Crtr.Components {
 		public override void Init() {
 			base.Init();
 			mesh.Init(transform);
+			mesh.Mesh = new Mesh();
 
 			mesh.Renderer.sharedMaterials = materials = new Material[] {
 				MeshWrapper.NewMaterial(),

Assets/Cryville/Crtr/Components/SpriteBase.cs

@@ -89,7 +89,7 @@ namespace Cryville.Crtr.Components {
 		protected void InternalInit(string meshName = "quad") {
 			mesh.Init(transform);
 			mesh.Renderer.sharedMaterials = materials = new Material[] { MeshWrapper.NewMaterial() };
-			mesh.Mesh = GenericResources.Meshes[meshName];
+			mesh.Mesh = Mesh.Instantiate(GenericResources.Meshes[meshName]);
 			UpdateColor();
 			UpdateScale();
 			UpdateZIndex();

Assets/Cryville/Crtr/MeshWrapper.cs

@@ -10,9 +10,10 @@ namespace Cryville.Crtr {
 			get;
 			private set;
 		}
+		Mesh m_mesh;
 		public Mesh Mesh {
-			get { return MeshFilter.mesh; }
-			set { MeshFilter.mesh = value; }
+			get { return m_mesh; }
+			set { MeshFilter.sharedMesh = m_mesh = value; }
 		}
 		public Transform MeshTransform {
 			get;
@@ -42,7 +43,8 @@ namespace Cryville.Crtr {
 			Initialized = true;
 		}
 		public void Destroy() {
-			Mesh.Destroy(Mesh);
+			Mesh.Destroy(m_mesh);
+			m_mesh = null;
 			GameObject.Destroy(MeshObject);
 		}
 	}