Add storage adapter for YAC

[marc-mabe]

An extreme fast shared memory cache extension YAC.
It's still in beta and it's not sure if this extension ever reaches it's beta state as it doesn't have a locking mechanism which leads a possibility to retrieve wrong data.

However it seems like this extension is already very popular and alternatives like APCu are still in beta, too.

[Maks3w]

Why ZF3 and not next feature release?

[marc-mabe]

It's because of time. But you are right, if someone else likes to implement I'm happy :)

[weierophinney]

This repository has been closed and moved to laminas/laminas-cache; a new issue has been opened at laminas/laminas-cache#12.