Serpentine3D 0.7.1

Added

• A layer carries a print width and a linetype you can set in the panel.
  The layers panel grows a Print column and a Type column: Print is the pen
  width in millimetres a layer plots at, blank for the device default, and
  Type cycles the layer's linetype. A detail on a layout now plots each
  layer's edges at that layer's width, in PDF and in DXF, rather than the one
  width every line used to get. The on-screen weight is untouched, so nothing
  looks different in the viewport, and the width round-trips through a .3dm as
  Rhino's PlotWeight. Requested by Jonas Pedrotti.

• mergeallcoplanarfaces tidies a polysurface after a boolean. A union
  of two boxes side by side leaves each spanning side split into two
  coplanar strips, so the result has ten faces where six would do.
  mergeallcoplanarfaces (alias mergeallfaces) fuses coplanar neighbours
  and drops the seam edges with them, so the box reads as a box again. This
  is Rhino's MergeAllCoplanarFaces. The volume does not move, and an object
  with nothing to merge is left alone. Requested by Jonas Pedrotti.

• join works on surfaces, not just curves. Pick two surfaces that
  share an edge and join (alias j) now stitches them into one
  polysurface, exactly as it always has for curves. Surfaces that close up
  a volume between them, the six faces of a box for instance, come back as
  a solid rather than a hollow shell. Surfaces that touch nothing are left
  where they are, and the command says so instead of quietly bundling them
  together. Requested by Jonas Pedrotti.

Fixed

• A boolean that cuts a solid in two now gives you two objects. Saw a
  bar in half with booleandifference and Serpentine kept it as one: one
  name in the layers panel, one gumball sitting in the gap, and both halves
  moving together. The kernel was never confused, it handed back a compound
  with a solid in it per piece, but nothing downstream looked inside. Now
  each loose piece is its own object, the first one keeping the original's
  id so its name, its layer and anything built from it survive the cut.
  Union and intersection do the same, so unioning two solids that never
  touch leaves two objects rather than one. Anything still joined is left
  alone, including a solid with a void in it, which has a second shell but
  is emphatically still one object. Reported by Jonas Pedrotti.

• explode on a severed solid gives you the pieces, not the faces.
  A bar cut in half exploded into twelve faces rather than the two bars,
  because the shape was asked what kind of thing it was before it was asked
  what it held. Compounds of curves exploded into nothing at all, and now
  come apart properly too.

• Text files are UTF-8 everywhere, not the machine's locale. A document,
  a config, an autosave, an .obj, an .stl, a .usda or a journal was read and
  written in whatever encoding the operating system defaulted to, which is
  UTF-8 on Linux and macOS but can be cp1252 on a Windows box in a non-English
  locale. A layer name or a file path outside ASCII round-tripped to mojibake,
  or raised, on that one machine and nowhere we could reproduce. Every text
  file now states UTF-8.