adding missing files

Project/Assets/ML-Agents/Examples/GridWorld/Prefabs/Area.prefab

     VectorActionDescriptions: []
     VectorActionSpaceType: 0
     hasUpgradedBrainParametersWithActionSpec: 1
-  m_Model: {fileID: 11400000, guid: 224abbd8cccad49b9b654e41dd68fd46, type: 3}
+  m_Model: {fileID: 11400000, guid: 255872f7c70ca4901b80bd5aed4a630f, type: 3}
   m_InferenceDevice: 2
   m_BehaviorType: 0
   m_BehaviorName: GridWorld
   m_Script: {fileID: 11500000, guid: 38b7cc1f5819445aa85e9a9b054552dc, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  m_SensorName: GoalSensor
+  m_SensorName: VectorSensor
   m_observationSize: 2
   m_ObservationType: 1
 --- !u!1 &1625008366184734

Project/Assets/ML-Agents/Examples/GridWorld/Scenes/GridWorld.unity

   area: {fileID: 1795599557}
   timeBetweenDecisionsAtInference: 0.15
   renderCamera: {fileID: 797520692}
-  gridGoal: 0
+  GreenBottom: {fileID: 299607777}
+  RedBottom: {fileID: 1559803814}
   maskActions: 1
 --- !u!65 &125487788
 BoxCollider:
     VectorActionDescriptions: []
     VectorActionSpaceType: 0
     hasUpgradedBrainParametersWithActionSpec: 1
-  m_Model: {fileID: 11400000, guid: a812f1ce7763a4a0c912717f3594fe20, type: 3}
+  m_Model: {fileID: 11400000, guid: 255872f7c70ca4901b80bd5aed4a630f, type: 3}
   m_InferenceDevice: 2
   m_BehaviorType: 0
   m_BehaviorName: GridWorld
   m_Script: {fileID: 11500000, guid: 38b7cc1f5819445aa85e9a9b054552dc, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  m_SensorName: GoalSensor
+  m_SensorName: VectorlSensor
   m_observationSize: 2
   m_ObservationType: 1
 --- !u!1 &299607777

Project/Assets/ML-Agents/Examples/GridWorld/TFModels.meta

 fileFormatVersion: 2
 guid: b9c5639f5544e49d785119b8a28305bd
 folderAsset: yes
-timeCreated: 1505509039
-licenseType: Pro
+  externalObjects: {}
   userData: 
   assetBundleName: 
   assetBundleVariant: 

Project/Assets/ML-Agents/Examples/GridWorld/TFModels/GridWorld.onnx.meta

+fileFormatVersion: 2
+guid: 255872f7c70ca4901b80bd5aed4a630f
+ScriptedImporter:
+  fileIDToRecycleName:
+    11400000: main obj
+    11400002: model data
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 11500000, guid: 683b6cb6d0a474744822c888b46772c9, type: 3}
+  optimizeModel: 1
+  forceArbitraryBatchSize: 1
+  treatErrorsAsWarnings: 0
+  importMode: 1