Features introduced in 5.0

• Terminal independent dash types.
• The default sequence of colors used for successive elements in a plot is more easily distinguished by users with color-vision defects.
• New plot types with parallelaxes, with table.
• Hypertext labels activated by a mouse-over event.
• Explicit sampling ranges in 2D and 3D function plots and pseudofiles '+' and '++'.
• Plugin support through new command import that attaches a user-defined function name to a function provided by an external shared object.