Typo

README.md

@@ -4,7 +4,7 @@
 
 This package is a proposed set of messages to unify computer
 vision and object detection efforts in ROS. Please feel free to suggest
-specific changesor add functionality with a pull request, and also visit our
+specific changes or add functionality with a pull request, and also visit our
 [Discourse topic](https://discourse.ros.org/t/new-computer-vision-message-standards/1819) for discussion.
 
 ## Overview
@@ -65,4 +65,4 @@ can be fully represented are:
   * [4] [Object Recognition Kitchen](https://wg-perception.github.io/ork_tutorials/tutorial03/tutorial.html)
   * [5] [Attribute Detector](http://campar.in.tum.de/pub/hinterstoisser2011linemod/hinterstoisser2011linemod.pdf)
   * [6] [URDFs on the parameter server](http://wiki.ros.org/urdf/Tutorials/Using%20urdf%20with%20robot_state_publisher#Launch_File)
-  * [7] [ROS Enhancement Proposals](http://www.ros.org/reps/rep-0000.html)
+  * [7] [ROS Enhancement Proposals](http://www.ros.org/reps/rep-0000.html)