* boilerplate for category attribute
* style tweaks for Travis
* I read up on valid-jsdoc
* add to horizontal as well
* categories for vertical/event
* categories for vertical/data
* categories for vertical/control
* categories for vertical/looks
* categories for vertical/more
* categories for vertical/motion
* categories for vertical/operators
* categories for vertical/pen
* categories for vertical/senising
* rename Blockly.Categories.sounds to Blockly.Categories.sound
* add categories for vertical/sound
* categories for horizontal/control
* categories for horizontal/event
* categories for horizontal/wedo -- based off of color instead of adding wedo category