added SunLightNode
tweaked lighting of shadow example
tweaked example
tweaked example
added orthographic camera support
added possiblity to disable pipelines
wrapped new SunLightNode parameters
Merge branch 'feature/sun' of github.com:vrsys/avango into feature/sun
added cross, dot, and some matrix initializers
Merge branch 'feature/sun' of github.com:vrsys/avango into feature/sun
updated shadow example
Merge branch 'feature/sun' of github.com:vrsys/avango into feature/sun
added sun to picking example