Footprint for Molex 1041681620

Added footprint for Molex 1041681620

Datasheet: https://www.molex.com/pdm_docs/sd/1041681620_sd.pdf

Footprint:

This PR for the symbol is #644 This PR for the STEP/WRL is #319

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Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items:

• 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