Added StateMachine creation functionality

CHANGELOG.md

 
 ## 2019.3.2
 
+#### Added
+- Added Create State button to StateMachines
+- Added State Machine templates in the GameObject Creation Menu
+
 #### Changed
 
 - **Delayed Logic** now has a mode that allows you to have a random delay within a range.

Editor/HiearchyItems.cs

 using UnityEngine;
 using UnityEditor;
+using System.Linq;
+        #region STATE MACHINES
+        [MenuItem("GameObject/Gameplay Ingredients/State Machines/State Machine (Empty)", false, 10)]
+        static void CreateEmptyStateMachine()
+        {
+            var go = new GameObject("New StateMachine");
+            var sm = go.AddComponent<StateMachines.StateMachine>();
+
+            if (Selection.activeGameObject != null)
+                go.transform.parent = Selection.activeGameObject.transform;
+        }
+
+        [MenuItem("GameObject/Gameplay Ingredients/State Machines/State Machine (On\\Off)", false, 10)]
+        static void CreateTwoStateStateMachine()
+        {
+            var go = new GameObject("New StateMachine");
+            var sm = go.AddComponent<StateMachines.StateMachine>();
+
+            AddState(sm, "On");
+            AddState(sm, "Off");
+
+            sm.DefaultState = "On";
+
+            if (Selection.activeGameObject != null)
+                go.transform.parent = Selection.activeGameObject.transform;
+        }
+
+        [MenuItem("GameObject/Gameplay Ingredients/State Machines/State Machine (On\\Off\\Disabled)", false, 10)]
+        static void CreateThreeStateStateMachine()
+        {
+            var go = new GameObject("New StateMachine");
+            var sm = go.AddComponent<StateMachines.StateMachine>();
+
+            AddState(sm, "Disabled");
+            AddState(sm, "On");
+            AddState(sm, "Off");
+
+            sm.DefaultState = "Disabled";
+
+            if (Selection.activeGameObject != null)
+                go.transform.parent = Selection.activeGameObject.transform;
+        }
+
+        static StateMachines.State AddState(StateMachines.StateMachine sm, string name)
+        {
+            var goState = new GameObject(name);
+            var state = goState.AddComponent<StateMachines.State>();
+            goState.transform.parent = sm.gameObject.transform;
+            goState.transform.localPosition = Vector3.zero;
+            goState.transform.localRotation = Quaternion.identity;
+            goState.transform.localScale = Vector3.one;
+            sm.States = sm.States.Concat(new StateMachines.State[] { state }).ToArray();
+            return state;
+        }
+
+
+        #endregion
+
         #region TRIGGERS
 
         [MenuItem("GameObject/Gameplay Ingredients/Events/Trigger (Box)", false, 10)]

Runtime/Ingredients/StateMachine/StateMachine.cs

         public string DefaultState;
 
         [ReorderableList, NonNullCheck]
-        public State[] States;
+        public State[] States = new State[0];
-        
-        [ContextMenu("Reset State Objects")]
+
+        [Button("Create New State")]
+        private void AddNewState()
+        {
+            var newState = new GameObject($"State {States.Length}");
+            var state = newState.AddComponent<State>();
+            newState.transform.parent = transform;
+            newState.transform.localPosition = Vector3.zero;
+            newState.transform.localRotation = Quaternion.identity;
+            newState.transform.localScale = Vector3.one;
+            States = States.Concat(new State[] { state }).ToArray();
+
+            if (m_CurrentState == null)
+                m_CurrentState = state;
+        }
+
+        [Button("Reset State Objects")]
         private void UpdateFromState()
         {
             foreach(var state in States)