Draw EER 0.1.1

Packaging and release fixes; corrected changelog.

Draw EER 0.1.0

The first release.

Diagrams

• Write ER and EER diagrams as text in .eer files, in a small language made for it (see
  the language reference).
• Drawn in classic Chen notation, as in database courses: entities and weak entities,
  relationships and identifying relationships, key, secondary key, partial key, composite,
  multi-valued and derived attributes, composite keys, cardinalities (1, N, (min,max)),
  total participation, role names and recursive relationships.
• EER constructs: specialization with D and O circles (total, partial, or neither),
  multi-level hierarchies, multiple inheritance, categories (U), part-of with the "Has"
  hexagon, aggregation in a dashed box, and repeated entities.
• Persian (right-to-left) names, mixed freely with English ones, shaped with the bundled
  Vazirmatn font.
• An automatic layout tuned on textbook figures: straight entity–relationship–entity lines,
  ternary relationships as a T, hierarchies as top-down trees, attributes fanned out where
  they do not cross anything, and a landscape drawing.

VS Code

• Live preview beside the editor, redrawn as you type, following the color theme, with zoom,
  pan and fit.
• Drag shapes and attributes to move them; moves are saved in a .eer.layout.json file next
  to the diagram, and from then on nothing moves unless you move it. Undo, redo and reset.
• Export to SVG (with the font embedded, so Persian text looks the same everywhere) and PNG.
• Syntax highlighting, completion, and syntax errors with "did you mean" hints and Quick
  Fixes. There is no other checking: whatever parses is drawn.

Known issues

• In large diagrams with cycles of relationships, the automatic layout can leave a few lines
  much longer than the rest (for example around «بستری» and «مربوط به» in a hospital
  diagram). Dragging the shapes closer fixes it, and the positions are kept. A layout search
  that moves several shapes at once is planned for 0.2.0.