merge of latest lindenlab/svn-imports-viewer-20

etc/message.xml

indra/linux_updater/linux_updater.cpp

indra/llcommon/lllslconstants.h

indra/llplugin/llpluginclassmedia.cpp

indra/llplugin/llpluginclassmedia.h

indra/llplugin/llpluginmessage.cpp

indra/llplugin/llpluginmessage.h

indra/llplugin/llpluginprocesschild.cpp

indra/llplugin/llpluginprocesschild.h

indra/llplugin/llpluginprocessparent.cpp

indra/llplugin/llpluginprocessparent.h

indra/llprimitive/CMakeLists.txt

indra/llprimitive/llmediaentry.cpp

indra/llprimitive/llmediaentry.h

indra/llprimitive/llprimitive.cpp

indra/llprimitive/lltextureentry.cpp

indra/llprimitive/lltextureentry.h

indra/llprimitive/tests/llmediaentry_test.cpp

indra/llui/CMakeLists.txt

indra/llui/llbutton.cpp