merge changes for 4.0.0-release

.hgtags

BuildParams

autobuild.xml

indra/CMakeLists.txt

indra/cmake/00-Common.cmake

indra/cmake/CEFPlugin.cmake

indra/cmake/CMakeLists.txt

indra/cmake/Linking.cmake

indra/cmake/Variables.cmake

indra/cmake/WebKitLibPlugin.cmake

indra/lib/python/indra/util/llmanifest.py

indra/llmessage/llcurl.cpp

indra/llmessage/llcurl.h

indra/llplugin/CMakeLists.txt

indra/llplugin/llpluginclassmedia.cpp

indra/llplugin/llpluginclassmedia.h

indra/llplugin/llpluginclassmediaowner.h

indra/llplugin/llpluginprocesschild.cpp

indra/llplugin/llpluginprocesschild.h

indra/llplugin/llpluginprocessparent.cpp