Add sparkfun promicro
ProMicro does not support size defined datasheet so measured size by hand. https://www.sparkfun.com/products/12640 https://github.com/sparkfun/Pro_Micro/raw/master/Documentation/ProMicro16MHzv2.pdf
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Provide a URL to a datasheet for the footprint(s) you are contributing -
An example screenshot image is very helpful -
If there are matching symbol or 3D model pull requests, provide link(s) as appropriate -
Check the output of the Travis automated check scripts - fix any errors as required -
Give a reason behind any intentional library convention rule violation.