camera interface with following target abstract function limitation.

Author: jcs090218

Assets/JCSUnity/Scripts/JCS_Camera.cs

@@ -13,7 +13,6 @@
 
 namespace JCSUnity
 {
-
     /// <summary>
     /// Camera class for JCSUnity framework.
     /// </summary>
@@ -72,6 +71,10 @@ public abstract class JCS_Camera
         public Vector3 Velocity { get { return this.mVelocity; } set { this.mVelocity = value; } }
         public bool Following { get { return this.mFollowing; } set { this.mFollowing = value; } }
 
+        /* Get/Set the target this camera follows. */
+        public abstract void SetFollowTarget(Transform trans);
+        public abstract Transform GetFollowTarget();
+
         //========================================
         //      Unity's function
         //------------------------------