describe the way to license a library with Passage

[eparovyshnaya]

With Passage you can protect not only an end-product, but also a library.
In case tht product itself is covered by Passgae, there is a smooth combined licening scenario that leaves end user unaware of how exactly product-license relationship is done.

That would be good to have ghe following topics documented

• how to protect a library
• how to protect a library and an exploiting product: unify end user experience regarding license coverage assessment, license import, etc.