add a node prefab

Assets/Prefabs/Node.prefab

@@ -0,0 +1,70 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
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+GameObject:
+  m_ObjectHideFlags: 0
+  m_PrefabParentObject: {fileID: 0}
+  m_PrefabInternal: {fileID: 100100000}
+  serializedVersion: 4
+  m_Component:
+  - 4: {fileID: 472566}
+  - 135: {fileID: 13597038}
+  - 114: {fileID: 11413560}
+  m_Layer: 0
+  m_Name: Node
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!4 &472566
+Transform:
+  m_ObjectHideFlags: 1
+  m_PrefabParentObject: {fileID: 0}
+  m_PrefabInternal: {fileID: 100100000}
+  m_GameObject: {fileID: 192496}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_RootOrder: 0
+--- !u!114 &11413560
+MonoBehaviour:
+  m_ObjectHideFlags: 1
+  m_PrefabParentObject: {fileID: 0}
+  m_PrefabInternal: {fileID: 100100000}
+  m_GameObject: {fileID: 192496}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
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+  m_Name: 
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+  n_left: {fileID: 0}
+  n_down: {fileID: 0}
+  n_right: {fileID: 0}
+  pos: {x: 0, y: 0, z: 0}
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+SphereCollider:
+  m_ObjectHideFlags: 1
+  m_PrefabParentObject: {fileID: 0}
+  m_PrefabInternal: {fileID: 100100000}
+  m_GameObject: {fileID: 192496}
+  m_Material: {fileID: 0}
+  m_IsTrigger: 1
+  m_Enabled: 1
+  serializedVersion: 2
+  m_Radius: .5
+  m_Center: {x: 0, y: 0, z: 0}
+--- !u!1001 &100100000
+Prefab:
+  m_ObjectHideFlags: 1
+  serializedVersion: 2
+  m_Modification:
+    m_TransformParent: {fileID: 0}
+    m_Modifications: []
+    m_RemovedComponents: []
+  m_ParentPrefab: {fileID: 0}
+  m_RootGameObject: {fileID: 192496}
+  m_IsPrefabParent: 1

Assets/Prefabs/Node.prefab.meta

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+fileFormatVersion: 2
+guid: e46b9140fc8aa5244af91dc52b758061
+timeCreated: 1439758887
+licenseType: Free
+NativeFormatImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: