Fix companion spam if player instantly finishes a quest (#64)

Compile changes; re-tweak faction strength rewards from promoting com…

…panions

fix unassigned register in previous commit

Scene and scene prop fixes: Minas Thirith model, Hornburg model, Amon…

… Hen models and collision

Reset a few scene terrain codes that shouldn't have been committed

Bugfixes: terrain effects (absurd damage values); terrain assignment …

…(didn't reset); missing item assets

Recolour a few flora assets for slightly less lushness

Fix difficulty values for old savegames

Adjust shadow and portal materials so they work with WSE2. Turns out …

…that it's the "uniform lighting" flag that causes WSE2 to render it fully opaque for some absurd reason.

Bugfixes: companion throwing skill; wound related traits; Pelennor ba…

…ttlefield spawns