Add Cmake EXPORT support
Add Cmake EXPORT support

This lets library consumers easiy find_package(Acid 1.2.3 REQUIRED)
That will import an Acid::Acid target which correctly includes its own headers.
Thus all a users needs after find_package() is target_link_libraries()

Equilibrium-Games/Flounder,Equilibrium-Games/Flounder,Equilibrium-Games/Flounder