numodel-bundle v0.3.0 -- maintenance release for numodel-plot.

numodel-bundle is a LuaLaTeX package for writing and rendering
numerical models (Euler-integrated dynamical systems) directly
inside LaTeX documents, aimed at physics teaching material.

The bundle ships two modules:

* numodel      -- modelling engine: text-mode rule tables, Forrester
                  stock-and-flow diagrams (tight/forrester/edu styles),
                  numerical simulation in Lua, y(x)-plot integration.
* numodel-plot -- PGFPlots styling layer that auto-sizes plots to a
                  clean tick lattice; configurable axis-label formats
                  (IEEE, ISO 80000-1).

numodel-plot 0.3.0 fixes two latent bugs that broke documented
behaviour and adds worked example plots to the manual:

* \calcplotdims no longer emits stray \par tokens from blank lines
  in its source.  Inside an \sbox or a subcaption/subfigure cell
  those \par tokens reserved ~3.4 cm of empty space on the left of
  every plot's bounding box.  Plots now sit tight in their boxes
  and tile correctly in tabular and subfigure layouts.
* Custom grid= values via \numodelplotsetup{grid={...}} now work as
  documented (previously the grid / unknown handler was registered
  with the wrong l3keys syntax for a .choice: key and any value
  other than mm-dots or none raised an "accepts only a fixed set
  of choices" error).
* legend pos=outer north east moved from \drawplot into the
  numodel/axis style so it can be overridden through
  \pgfplotsset{numodel/axis/.append style={legend pos=...}}.

numodel is bumped to 0.3.0 for version-sync only; no functional
changes there.

Pre-1.0 release; breaking changes still possible before 1.0.0.