merge changes for vmrg-193

BuildParams

doc/contributions.txt

indra/linux_crash_logger/llcrashloggerlinux.cpp

indra/linux_crash_logger/llcrashloggerlinux.h

indra/llcrashlogger/llcrashlogger.cpp

indra/llcrashlogger/llcrashlogger.h

indra/llmath/CMakeLists.txt

indra/llmath/llv4math.h

indra/llmath/llv4matrix3.h

indra/llmath/llv4matrix4.h

indra/llmath/llv4vector3.h

indra/llmath/llvolume.cpp

indra/llmath/llvolume.h

indra/llmessage/llassetstorage.cpp

indra/llmessage/llcurl.h

indra/llplugin/llpluginclassmedia.h

indra/llrender/llcubemap.cpp

indra/llrender/llgl.cpp

indra/llrender/llgl.h

indra/llrender/llglheaders.h