Merge pull request #864 from mingodad/patch-2

Fix compilation on DMD master.
Fixes issue #868
Merge pull request #869 from japplegame/patch-1

Fix serializing Nullable!T with JsonStringSerializer with numeric T. Fixes #868.
DFixed the code: Embrace new alias syntax, kill C-style array, annihilate string concatenation, long live to DIP65
Merge pull request #872 from Geod24/dfix-code

Modernize alias syntax, remove C-style arrays (dfix).
Adding example for future rest UDA fromHeader
Generalize findFirstUDA to findNextUDA
Adding funcattr and typetuple to vibe.internal.meta.all
Adding vibe.internal.meta.UDATuple to work with multiple usage of the same UDA
Add attributes for parameter origin
Server side handling of @fromHeader
Handle @fromHeader client-side