Minor changes in README

README.md

@@ -1,6 +1,6 @@
 # ros_csv_extraction
-CSV Data Extraction Tool for ROS bag files. 
-ROS (robot operating system) is a software system gaining popularity in robotics for control and automation. 
+CSV Data Extraction Tool for ROS bag files.
+ROS (robot operating system) is a software system gaining popularity in robotics for control and automation.
 
 This repository provides a tool to extract data to CSV format for a number of ROS message types for analysis in other software.
 
@@ -18,7 +18,7 @@ sensor_msgs/NavSatFix
 gps_common/gpsVel
 umrr_driver/radar_msg (this was a type used by the CRUISE vehicle (see http://www.shanelynn.ie/csv-data-extraction-tool-for-ros-bag-files/))
 
-To install the data extraction tool, download the zip file, extract it somewhere on your ROS_PACKAGE_PATH, and run rosmake data_extraction before using.
+To install the data extraction tool, clone it to the `src` folder in your catkin_workspace, and `run catkin_make --pkg ros_csv_extraction`before using.
 
 # Usage
  * Extract all compatible topics in a bag file: