Update README to mention 2017 game

[JLLeitschuh]

No description provided.

[codecov-io]

Codecov Report

Merging #884 into master will decrease coverage by 0.53%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #884      +/-   ##
============================================
- Coverage     52.27%   51.74%   -0.54%     
+ Complexity     1163     1158       -5     
============================================
  Files           248      247       -1     
  Lines          7962     7812     -150     
  Branches        533      533              
============================================
- Hits           4162     4042     -120     
+ Misses         3621     3590      -31     
- Partials        179      180       +1

[AustinShalit]

Are we going to update this every year? That seems unreasonable. Maybe we should leave it open ended like:

As a result, many teams with minimal computer vision knowledge successfully used GRIP since the 2016 FIRST Robotics Competition game.

[JLLeitschuh]

Sure, that makes sense.