Some usability improvements.

• MadeCanAddr pulic and added functions to help interact with low-level sockaddr types. Sockets can now be opened with an address.
• Can create anError directly from aCanErrorFrame orstd::io::ErrorKind.
• #46 Applications can create error frames:
  • CanErrorFrame::new() now works.
  • CanErrorFrame::new_error() is similar but more intuitive using a raw ID word.
  • From<CanError> for CanErrorFrame to create an error frame from aCanError.
• AddedFrame::from_raw_id() andFrame::remote_from_raw_id()
• Bumped MSRV to 1.65.0