Add Kingbright KRC011 Reflective Opto Sensor
Created by: MatthewStephenson
This is the Kingbright KRC011 Subminiature Reflective Opto sensor.
Datasheet: http://www.kingbright.com/attachments/file/psearch/000/00/00/KRC011(Ver.15).pdf
Symbol PR: https://github.com/KiCad/kicad-symbols/pull/121
The automated check is failing on the "centre of footprint" part, but that is because it's taking the centroid of the pads, which are all on one side of the device. The actual body of the device is centred on the origin.
As always, comments and suggestions welcome.