add fxaa shader
add config for fxaa
Merge branch 'master' of https://github.com/voxelinc/voxellancer into fxaa

Conflicts:
	data/config.ini
	src/display/rendering/defaultrenderpipeline.h
	src/property/propertymanager.cpp
show current buffer in log
remove debug output from state::onLeft in test
Merge pull request #437 from voxelinc/fxaa

add fxaa shader