Use SVG / CSS instead of raster images where it possible

[aia]

In most cases instead of raster images it possible to use CSS or SVG, that means huge traffic savings(which is critically important on mobile networks) and reduces loading time.

For example, currently default cover photo in user profile or in club sized 735 KB. It's TOO much. In next IPS version it's size will be slightly lower, but it's still too much for slow or expensive moblie networks, especially taking into account what this image does not make any value for users.

Here is some SVG examples:

svg.7z (yes, here is 3 backgrounds, sized just in 2 kb in compressed state).