Things to document:

• greyed out Metview 3 icons
• pcont -> mcont
  
  • contour splitting
• pgraph -> mgraph
• psymb -> msymb
  
  • advanced mode
• Map View -> Geo View
• curve plotting
• ODB differences (Metview 3 ODB icons will not be visible)
• new legend icon
• ptext->mtext
• pcoast->mcoast
  
  • new resolutions ('high' really is high!)
• new projections
• Cartesian View
• axis plotting
• Macro functions return vectors instead of lists
• Macro functions return nil instead of missing values indicators
• Cross Section, etc: only plot one frame (currently)
• Grib Vectors icon replaces Vectors icon