Clean up environments

docs/Example-Environments.md

     * Observations: None
 * Reset Parameters: One, corresponding to goal size.
 
-## Spider
+## Crawler
-![Spider](../images/spider.png)
+![Crawler](../images/crawler.png)
-* Set-up: A spider with 4 arms and 4 forearms.
+* Set-up: A creature with 4 arms and 4 forearms.
 * Goal: The agents must move its body along the x axis without falling.
 * Agents: The environment contains 3 agent linked to a single brain.
 * Agent Reward Function (independent): 

unity-environment/Assets/ML-Agents/Examples/3DBall/Prefabs/Game.prefab

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unity-environment/Assets/ML-Agents/Examples/3DBall/Scene.unity

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unity-environment/Assets/ML-Agents/Examples/Area/Push.unity

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unity-environment/Assets/ML-Agents/Examples/Reacher/Scripts/FlyCamera.cs

         }
 
         //Keyboard commands
-        float f = 0.0f;
         Vector3 p = GetBaseInput();
         if (Input.GetKey(KeyCode.LeftShift))
         {

unity-environment/Assets/ML-Agents/Examples/Crawler/Resources/Crawler.prefab

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unity-environment/Assets/ML-Agents/Examples/Crawler/Scripts/CrawlerLegContact.cs

 using System.Collections.Generic;
 using UnityEngine;
 
-public class SpiderLegContact : MonoBehaviour {
+public class CrawlerLegContact : MonoBehaviour {
-    public SpiderAgentConfigurable agent;
+    public CrawlerAgentConfigurable agent;
 
     void Start(){
 //        agent = gameObject.transform.parent.gameObject.GetComponent<SpiderAgent>();

unity-environment/Assets/ML-Agents/Examples/Crawler/Scripts/CrawlerAgentConfigurable.cs

 using System.Collections.Generic;
 using UnityEngine;
 
-public class SpiderAgentConfigurable: Agent
+public class CrawlerAgentConfigurable: Agent
 {
 
     public float strength;
         Transform[] allChildren = GetComponentsInChildren<Transform>();
         foreach (Transform child in allChildren)
         {
-            if ((child.gameObject.name.Contains("Spider"))
+            if ((child.gameObject.name.Contains("Crawler"))
                 || (child.gameObject.name.Contains("parent")))
             {
                 continue;

unity-environment/Assets/ML-Agents/Examples/Crawler/Crawler.unity

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unity-environment/Assets/ML-Agents/Examples/Crawler/Scripts/CameraFollow.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class CameraFollow : MonoBehaviour {
+
+	public Transform target;
+	Vector3 offset;
+
+	// Use this for initialization
+	void Start () {
+		offset = gameObject.transform.position - target.position;
+	}
+	
+	// Update is called once per frame
+	void Update () {
+        //gameObject.transform.position = target.position + offset;
+        Vector3 newPosition = new Vector3(target.position.x + offset.x, transform.position.y, target.position.z + offset.z);
+        gameObject.transform.position = newPosition;
+	}
+}

unity-environment/Assets/ML-Agents/Examples/Crawler/Scripts/CrawlerAcademy.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class CrawlerAcademy : Academy
+{
+    public override void InitializeAcademy()
+    {
+        Monitor.verticalOffset = 1f;
+    }
+
+    public override void AcademyReset()
+    {
+
+
+    }
+
+    public override void AcademyStep()
+    {
+
+
+    }
+}

unity-environment/Assets/ML-Agents/Examples/Crawler/Scripts/CrawlerBodyContact.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class CrawlerBodyContact : MonoBehaviour {
+
+    CrawlerAgentConfigurable agent;
+
+    void Start(){
+        agent = gameObject.transform.parent.gameObject.GetComponent<CrawlerAgentConfigurable>();
+    }
+
+    void OnTriggerEnter(Collider other){
+        if (other.gameObject.name == "Ground")
+        {
+            agent.fell = true;
+        }
+    }
+}