making tests work in different environment

[jachym]

Hi, I try to get the plugin moving a bit according to our team needs.

First thing: I needed tests to be running.

It seems, there are following files missing in the test suite:

• expected/scene1.png
• expected/scene1_qwebpage.png
• tests/data/scene1.qto3settings

Could you please send them to me, I'll add them to the pull request?

Thank you