Changes in version 0.1.0                        

Initial features

  - dee() creates "dee" class objects.
    
      - Can be plotted with plot.dee() if suggested packages {omsvg} and
        {nanosvgr} are installed.
      - Can be converted to an {omsvg} "svg" class object with
        as_omsvg() if suggested package {omsvg} is installed.

  - dee_options() returns a list of (current or default) {dee} package
    option values.

  - Absolute coordinate svg d path command helpers:
    
      - A(), AZ() are the elliptical arc curve commands.
      - C(), CZ(), S(), SZ() are the cubic Bézier curve commands.
      - L(), LZ(), H(), HZ(), V(), VZ() are the "lineto" commands.
      - M(), MZ() are the "moveto" commands.
      - Q(), QZ(), T(), TZ() are the quadratic Bézier curve commands.
      - Z() is the "closepath" command.

  - Relative coordinate svg d path command helpers:
    
      - aa(), az() are the elliptical arc curve commands.
      - cc(), cz(), ss(), sz() are the cubic Bézier curve commands.
      - ll(), lz(), hh(), hz(), vv(), vz() are the "lineto" commands.
      - mm(), mz() are the "moveto" commands.
      - qq(), qz(), tt(), tz() are the quadratic Bézier curve commands.
      - zz() is the "closepath" command.

  - svg d path convenience wrappers:
    
      - d_aabb() is a wrapper around d_rect() to create an axis-aligned
        bounding box.
    
      - d_arc1() d_arc2(), d_arc3(), d_arc4(), d_arc12(), d_arc23(),
        d_arc34(), d_arc41(), d_arc123(), d_arc234(), d_arc341(), and
        d_arc412() are wrappers to create elliptical arc paths.
    
      - d_fslash() and d_bslash() are wrappers around MZ() to build
        forward/backward slash paths.
    
      - d_ellipse() is a wrapper around M() and AZ() to build ellipse
        paths.
        
          - d_circle() is a wrapper around d_ellipse() to build circle
            paths.
    
      - d_polygon() is a wrapper around MZ() to build polygon paths. If
        its argument offset is nonzero will compute an offset region.
        
          - d_isotoxal_2ngon() is a wrapper around d_polygon() to create
            isotoxal 2n-gon polygons. d_star() is an alias.
          - d_regular_ngon() is a wrapper around d_polygon() to create
            regular polygons.
    
      - d_rect() is a wrapper around d_polygon() to build rectangle
        paths.

  - Miscellaneous helper functions:
    
      - height_slash_left(), height_slash_right(), width_slash_left(),
        and width_slash_right() return the height or width of the left
        or right end of a d_fslash() or d_bslash() shape.
      - x_ellipse_left(), x_ellipse_right(), y_ellipse_top(), and
        y_ellipse_bottom() return the leftmost/rightmost x-coordinate or
        topmost/bottommost y-coordinate on a (possibly rotated) ellipse
        at a given y or x value.