Update README to mention 2017 game (#884)

* Update README to mention 2016 and future games

Author: JLLeitschuh

README.md

@@ -13,7 +13,7 @@ GRIP (the Graphically Represented Image Processing engine) is an application for
 vision algorithms, primarily for robotics applications.
 Developing a vision program can be difficult because it is hard to visualize the intermediate results. 
 GRIP simplifies and accelerates the creation of vision systems for experienced users and reduces the barrier to entry for inexperienced users.
-As a result, many teams with minimal computer vision knowledge successfully used GRIP in the 2016 FIRST Robotics Competition game.
+As a result, many teams with minimal computer vision knowledge successfully used GRIP since the 2016 FIRST Robotics Competition game.
 
 # Features