Included callback for row response
Merge pull request #37 from villanuevawill/gridEngine

Included callback for row response
Included callback functionality in loop
Merge pull request #40 from villanuevawill/gridEngine

Included callback functionality in loop
Fixed callback bug
Merge pull request #41 from villanuevawill/gridEngine

Fixed callback bug
added 'stop' functionality (not added to ui)
Added callback to the play command.
Cycles through columns that are playing as they are played. (ui)
Merge pull request #42 from onetruebob/feat/ShowPlayingCol

Feat/show playing col
Merge pull request #43 from gMajr/dev

Deploy with columns of playing grid showing they are being played.