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
Internationalization
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Selecting text to be translated
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Gettext, POedit and message catalogs
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Adding a new language
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Updating translations
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