added example GUI to system
example of buttons
updated to latest system pull
update the visual system commit
prepping for draw RGBD
Merge branch 'master' of github.com:CLOUDS-Interactive-Documentary/EmptyVisualSystem

Conflicts:
	vs_src/CloudsVisualSystemEmpty.cpp
Merge branch 'master' of github.com:CLOUDS-Interactive-Documentary/EmptyVisualSystem
Merge commit '2d9b6bc4ae90c9df3355ddc487f0dfd2832b4a22'

Conflicts:
	vs_src/CloudsVisualSystemEmpty.cpp
Submodule update.
Post-merge cleanup.