Log Message:
Update opencpn to 4.0.0. Changes since 3.2.2:
- Increased performance in all modes, particularly when using OpenGL graphics
  acceleration.
- Additional network interface methods, including TCP/IP client/server and
  UDP broadcast.
- Support for multiple data source instances, including
    Filtering and prioritization of messages
    Output of NMEA data streams for real-time integration into ship systems
- Improved support for Mac OS X systems, including 64 bit native support.
- Integrated Tablet/Touch screen support.
- AIS Personal Locater Beacon (PLB) configuration and tracking.
- Enhanced AIS target tracking modes.
- GRIB PlugIn feature additions.
  Graphical GRIB email request generation.
  Moving particle wind overlay.
  Enhanced GRIB data type support.
- Dashboard PlugIn feature additions.
  More selectable instruments.
- Major update to embedded Users Manual.
- Measurably improved performance and reliability over all supported platforms.