N.S.W: improve module summary and documentation for 'associate'
Remove IOCP.Winsock and IOCP.Winsock.Load
IOCP.CompletionPort: remove checkPendingIf_
Merge IOCP.Bindings into IOCP.CompletionPort
IOCP.Mswsock: add module summary
Remove IsHANDLE and IsLPOVERLAPPED
Remove IOCP.Winsock.Bindings
IOCP.Winsock.Types: remove my versions of SockAddr etc.
Organize IOCP.Winsock.Types, and add toHANDLE and mkWSABUF
Rename IOCP.Mswsock to IOCP.Winsock.Mswsock