1.0 #3

This is an overview issue to track all the feature we want before 1.0:

• lots of plot types
• legends
• output plots in may formats
  • SVG
  • ASCII
  • PNG
  • 3D format
• different projections
  • normal 2D plot
  • 3D plot on a 2D page
  • map projections
• dual y-axes
• combined (e.g. scatter plus histogram) plots
• easy to get own data into plots
• extensible with new output formats and projects
• custom axis formatting
• custom styling