open-source-silicon.dev

<https://github.com/IHP-GmbH/IHP-Open-PDK/pull/127|#127 Update IOs, Pycells, LVS, DRM, README>
Pull request opened by <https://github.com/KrzysztofHerman|KrzysztofHerman>
Hot fix in Readme:  
OpenROAD, OpenROAD flow scripts, Qucs-S added as supported EDA tools.
<https://github.com/IHP-GmbH/IHP-Open-PDK|IHP-GmbH/IHP-Open-PDK>
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<https://github.com/IHP-GmbH/IHP-Open-PDK/pull/127|#127 Update IOs, Pycells, LVS, DRM, README>
Pull request closed by <https://github.com/sergeiandreyev|sergeiandreyev>
<https://github.com/IHP-GmbH/IHP-Open-PDK|IHP-GmbH/IHP-Open-PDK>