Added CLIENT const, that is describing what SDK is sending the request. All requests got the argument added.
Removed SLTMatchingLevel and SLT2DCanvasLevel, as SLT Level is enough.
 SLTLevel content updating logic is made more secure now.
Renamed SLTBoardLayer.layerId to token.
Removed layer class usage in chunk, as was suggested by TIGR.
Update.
Merge branch 'dev'
Update.