#376 (and #386): Lay_...() has correct orientation in combination with LAYOUT_LANDSCAPE() (and theme documentation is updated)

[kirchsth]

Important

PlantUML v2.12.0: Layout could be changed based on bugfix.
If LAYOUT_LANDSCAPE() is combined with Lay_*() calls then the elements are correct positioned based on the new implementation.
The old implementation swapped up<->left and down<->right (details see issue 376).
The old behavior can be re-activated with !NO_LAY_ROTATE=1. Details see Compatibility mode NO_LAY_ROTATE=1.

• LAYOUT_LANDSCAPE() rotates the Lay_* directions too #376 LAYOUT_LANDSCAPE() with Lay_...() fix
  • Lay_...() calls produces the correct orientation in combination with LAYOUT_LANDSCAPE()
  • fix can be deactivated via !NO_LAY_ROTATE=1 in source command line argument -DNO_LAY_ROTATE=1

• Problem with Theme colors #386 theme has to be before includes; theme sample is added
  • extend Theme.md documentation: !theme has to be before !include
  • add a container diagram with a theme to C4CoreDiagrams(.md)

Both changes can be checked via my branch.

BR
Helmut