Bugfixes, refactoring

[czechboy0]

• changed port to just be UInt16 instead of an enum
• fixed wrong endianness when parsing port from ResolvedInternetAddress
• fixed potential leaks in cases when ResolvedInternetAddress was getting created
• added local and remote address getters on sockets
• added a way to wait on a socket to become readable with a timeout

[tanner0101]

These look good to me. My only suggestion would be the usage of defer over including deallocation calls in the guard else statements.

[czechboy0]

Thanks, see above for a response on why we can't really use defer.