Change webcam icon to point in the direction the webcam is facing

[wmbr]

I think it's very useful to see on the map already what direction a webcam is facing, and this data is often available.
To this end I changed the icon to be more directional (svg taken from https://de.wikipedia.org/wiki/Datei:Video_camera_icon_svg.svg) and rotated it appropriately.

[wvanderp]

Hello,

Thanks for creating this merge request. The idea is good, and I would like to add it. I have a few requests before we can merge the changes.

First, the good. I like the extra information it brings to the map. I also like the way it uses multiple tags to determine the direction.

Here is a list of things that need to be fixed before I can merge it.

• Remove the brownish outline on the icon
• fix the eslint error
• fix the typescript error by installing @types/leaflet-rotatedmarker
• add thanks for the new icon to the read me file
• resolve the code comments

Thanks again for supplying this PR, and I look forward to the fixes and merging it.

[wvanderp]

I hate to do this to you. And I'm always displeased when somebody has another round of comments for me.

I've updated all the notes and checked if they are still valid. The effort is appreciated.

[wvanderp]

First of all, thank you for making this.

Sorry for the mess I've made of the PR. I wanted to rebase and had some git mishaps along the way.

I also put some finishing touches on the code myself. You can find them in 49bb94e.

Thank you for having this idea and taking the time to implement it.

[wmbr]

Very nice. I love the new "grouping" feature on zoom out. Thank for starting this project.