Merge remote-tracking branch 'origin/master' into v0.4.8_candidate
show remote user selections, ctrl-s to save now, remove rtt from renderer when material deleted
 copy and paste for materials and layers
first work on trigger behavior, spot angle setting
fix for materialdef caching problem, first working trigger behavior! some work on how events and ticks are routed through the system
add event and property triggers
Merge branch 'development' of https://github.com/NikolaySuslov/Sandbox into development
Merge branch 'development' into vle