vvvv.js-examples compatibility merge

[tekcor]

Thanks for fixing the group bug.

Here comes a set of new shaders and nodes that is needed to run the examples

PCF Shader has definately just a twist in the matrixes because it works a little bit different in glsl then hlsl (row and columns are swapped -> math puzzle involving multiple possible combinations).

[tekcor]

Hey @zauner

Bitte merge einfach mal alles rein, dann geht es mal wieder ein stück weiter

Biggest Changes:

glTF full specification (except character animation)

browser editor pimped up for higher DPI displays and better working comfort