beremiz

Extend HMI:JsonTable, create Edit CSV POU, create example, add some doc (#41)

* Extend Jsontable widget, create Edit CSV POU, create example for both

* Add doc for HMI:Image and HMI:JsonTable

* Expand example to include HMI:Image
Edit PLC program
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POU languages and type
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POU interfaces
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Global variables
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Located variables
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Resources, task and instances
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Copy-paste
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