Moved ConfigVars defaults to .cpp
Consistency check implementations moved to .cpp
MPDMessageHandler logs std::exception when stuff happens
Added helpers for retrieving winapi error strings
Closing connection invalidates socket (fixes read on not a socket error)
- Refixed order of Pos/Id
Added logging to foobar console
- Trailing "\n" in logfiles is written on destruction
Saving values from ConfigDialog
- Retrieving valid interfaces (not yet displayed)