add link to mssao (for later integration ?)
Helpers4Light: refactor shared code
LBuffer: use a default White ambiant light if no lights (to avoid black)
build: configure to publish
Lights: suboptimal integration of DirectionalShadow
Lights: add simple convertion from Light to Geometry + fix typo (ambiant -> ambient)
README: update
Sammple01: enhance light + add sky
MaterialConverter: should not copy every RenderState parameter
Lights: are put in Bucket.Translucent
some glsl are generated and should be  genereted before compile/run/package
incomplete workaround to avoid processing lights without parent