Move some parameters to Render UI, panel 'general settings'.
Add more options DarkSky Background mode.
Move 'verbosity level' from 'plugins options' to 'general settings' panel.
Move 'export render' code to new file export_render.erl
Starting add new 'general' defines for similar items (photons, bounces, etc..)
Applied 'non variables' style code to export materials
Add new help 'specialized' help parts.
Add code for 'DarkSky' background mode.
Move some UI parameters to 'general settings' panel.
Add new export_render.erl file