Dht11 2

Created by: Misca1234

Overhaul of the DHT11 (recreated push from https://github.com/KiCad/kicad-footprints/pull/407)

Data sheet http://aosong.com/userfiles/files/media/DHT11%E6%95%B0%E5%AD%97%E6%B8%A9%E6%B9%BF%E5%BA%A6%E4%BC%A0%E6%84%9F%E5%99%A8%E6%A8%A1%E5%9D%97.pdf

Foot print push https://github.com/KiCad/kicad-footprints/pull/576

Symbol push https://github.com/KiCad/kicad-symbols/pull/586

3D model push https://github.com/KiCad/kicad-packages3D/pull/313

3D model source code push https://github.com/KiCad/kicad-packages3D-source/pull/126

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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

• Ensure that the associated footprints match the official footprint library

• If there are matching footprint PRs, provide link(s) as appropriate

• Check the output of the Travis automated check scripts - fix any errors as required