Mac keyboard shortcuts now use command

[AustinShalit]

Mac keyboard shortcuts used control before. Now they use command. Windows still uses control.

Tested on OS X 10.11.5 and Window 10.

[codecov-io]

Current coverage is 65.25%

Merging #598 into master will increase coverage by <.01%

1. 2 files (not in diff) in ...va/edu/wpi/grip/core were modified. more
   • Misses -5
   • Hits +5

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  Files           174        174          
  Lines          5398       5398          
  Methods           0          0          
  Messages          0          0          
  Branches        517        517          
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+ Hits           3517       3522     +5   
+ Misses         1881       1876     -5   
  Partials          0          0          

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[JLLeitschuh]

Can you explain why this works this way? What up vs down does?

[SamCarlberg]

Up means that button is up (not pressed). Down means it's pressed

[AustinShalit]

Yup. Just like @SamCarlberg said. Control is the control key but the shortcut modifier is used to represent the modifier key which is used commonly in keyboard shortcuts on the host platform.