Documentation|DehReader: Mark Eternity's extensions for future reference
Renderer: Log about missing particle textures with pretty NativePaths
Optimize|liblegacy|Smoother: Smoother_Evaluate should not continuously log its internal state

There is no point doing this all the time when this info is only ever
relevant when debugging Smoother.
Debug|Resources: Log all Model.skin => Texture mappings when extra verbose
Fixed|Resources: Model skin selection error

When (re)building the #skin => Texture map one must ensure that the
indices uses in the MD2/DMD internal skin table are respected, else
the selector mechanism will choose the wrong skin. This means that
"duplicated" slots must map to the same Texture and missing textures
result in a NULL mapping for that skin number.

Issue #1871
Merge branch 'master' into common-episode-definition