Fix some typos, still raising an error

yaml/demo_visual_odometry_euroc.yaml

@@ -13,7 +13,7 @@ config:
 
   problem:
     node_rate: 100
-    follow: "tree_manager.yaml"
+    follow: "tree_manager_full_history.yaml"
     frame_structure: "POV"
     dimension: 3
     prior:
@@ -43,9 +43,9 @@ config:
   processors:
     -
       type: "ProcessorVisualOdometry"
-      name: "APRILTAG PROC"
+      name: "VISUALODOMETRY PROC"
       sensor_name: "CAMERA"
-      plugin: "apriltag"
+      plugin: "vision"
       follow: "processor_visual_odometry.yaml"
 
   ROS subscriber: