Hardware files for the Smoothieboard v2, and extension boards

##Uploading a board

When uploading a board, you should provide the following data :

• Kicad files
• Kicad components/libraries used in those files
• Gerber files ( unzipped, in a folder called "Gerber" )
• BOM file for the components, based on this model : https://is.gd/uxgJPX
• Readme.factory including information on how to produce the board ( if any )
• Readme.use including information on how to use the board. Should include a description of inputs and outputs/how to wire.
• Top and bottom pictures of the PCB, produced using http://gerblook.org/

Please try to use the same naming conventions as other board so there is some kind of unity in the repository.