Merge with viewer-development

doc/contributions.txt

indra/cmake/Boost.cmake

indra/cmake/GetPrerequisites_2_8.cmake

indra/cmake/LLAddBuildTest.cmake

indra/integration_tests/llui_libtest/llui_libtest.cpp

indra/linux_updater/linux_updater.cpp

indra/llmath/llbbox.cpp

indra/llmath/llbbox.h

indra/llmessage/llregionflags.h

indra/llui/llfloater.cpp

indra/llui/llmenugl.cpp

indra/llui/llurlentry.cpp

indra/llui/llurlentry.h

indra/llui/tests/llurlentry_stub.cpp

indra/llvfs/CMakeLists.txt

indra/llvfs/lldir.cpp

indra/llvfs/lldir.h

indra/llvfs/lldir_linux.cpp

indra/llvfs/lldir_linux.h

indra/llvfs/lldir_mac.cpp