Added S4 LEDs. Modified orientations.
Modified S4 LED's ies file. Changed to relative path in json.

Path only works for LumiverseCore. Lumiverse GUI can't find files.
Merge branch 'master' into chenxi

Conflicts:
	Lumiverse/source/Test/CMakeLists.txt
Fixed BufferDriver. Added a test show.

The test show lights up fixtures one by one for two rounds. In round
1, it's done in order of cue number. In round 2, it's done randomly.
Then, all lights are off and on again.
Merge branch 'working' of github.com:ebshimizu/Lumiverse into chenxi
Added namespace to snapshot so it can build.
Merge branch 'chenxi' into working

Conflicts:
	Lumiverse/source/LumiverseShowControl/Snapshot.cpp