Libraries page: unclear what many libraries are for
In the libraries page, it's often not clear what a library is actually for. Examples:
- "Fontconfig is a library for configuring and customizing font access." Do I need to use it to use any fonts? Do I need to configure my fonts for my UI?
- "HarfBuzz is a text shaping library." OK... should I be concerned with text shaping?
- "Gdk-pixbuf is an image loading library" Do I need to use this for every image I might want to display?
In most cases it just needs a bit more detail to explain when someone might need to use the library in question.