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
<?xml version="1.0" encoding="UTF-8"?>
<BaseParams Name="py_ext_0" IEC_Channel="0"/>