Responsive images on the planet

[luzfcb]

the current layout leaves very large images leak out of the visible area.
It is necessary, any change in the css to make the images are not outside the visible area

[rochacbruno]

Everything posted to the planet is under the source formatting, the template in planet only takes the content of the feed and renders it directly

https://github.com/python/planet/blob/master/code/python/index.html.tmpl#L74

So it would be needed to add some css
Adding

img {
    border: 0;
    height: 100%;
    max-width: 100%;
}

should help, but only if images are included inside proper containers, as we cannot validate the html structure, maybe it will need some JavaScript to format the images.

[rochacbruno]

I tested the solution proposed above, I will send a Pull Request for others to approve.

[rochacbruno]

The solution on above PR fixes the size of big images, waiting for another member to review and merge.