Update README.md (#17)

README.md

@@ -55,21 +55,21 @@ roslaunch scan_to_pcl_ros test.launch
 ![Node I/O](images/node_io.png)
 
 ### Runtime requirement
-TF (from the frame_id of scan to the frame_id of pcl) is required
+TF (from the frame_id of scan to the frame_id of pointcloud) is required
 
 ## Nodes
 ### scan_to_pcl
 #### Published Topics
 - /cloud (`sensor_msgs/PointCloud2`)
-  - The converted point cloud
+  - The converted pointcloud
 
 #### Subscribed Topics
 - /scan (`sensor_msgs/LaserScan`)
   - The input scan data
 
 #### Parameters
 - ~\<name>/<b>frame_id</b> (string, default: `base_scan`):<br>
-  The frame id of converted point cloud
+  The frame id of converted pointcloud
 
 ## References
 - https://github.com/ros-perception/pointcloud_to_laserscan