provide two new surveyjs widgets

[barais]

one is plantuml widget (a textarea to specify your uml diagram and a img to show the result), another one is phtocapture to take photo using camera (an element to get the flow, an img to get the result, two button to get the photo and to select the photo for the survey result)

Mainly to share the idea with the community. Code could be improved.

Do not hesitate to comment.

Regards