The rest of the implementation. The member attr_ is mutable to allow
reinterpret_cast in the attr() method.
No longer using pre-compiled headers.
Merge branch 'master' into feature/INET_Addr

Conflicts:
	client/client.vcxproj
	wrapper_facades/INET_Addr.h
	wrapper_facades/wrapper_facades.vcxproj
Merge pull request #2 from tekniskit/feature/INET_Addr

Feature/inet addr