SH-2244 Better VAO support -- still slower than non-VAO implementation for some reason

indra/llrender/llrender.cpp

indra/llrender/llvertexbuffer.cpp

indra/llrender/llvertexbuffer.h

indra/newview/app_settings/settings.xml

.../newview/app_settings/shaders/class1/deferred/alphaV.glsl

...ewview/app_settings/shaders/class1/deferred/diffuseV.glsl

...wview/app_settings/shaders/class1/deferred/emissiveV.glsl

...iew/app_settings/shaders/class1/deferred/fullbrightV.glsl

...ewview/app_settings/shaders/class1/objects/emissiveV.glsl

.../newview/app_settings/shaders/class2/deferred/alphaV.glsl

...app_settings/shaders/class2/objects/fullbrightShinyV.glsl

...view/app_settings/shaders/class2/objects/fullbrightV.glsl

...a/newview/app_settings/shaders/class2/objects/shinyV.glsl

.../newview/app_settings/shaders/class2/objects/simpleV.glsl

indra/newview/llface.cpp

indra/newview/llspatialpartition.cpp

indra/newview/llsprite.cpp

indra/newview/llviewerjointmesh.cpp

indra/newview/llviewerjointmesh_sse.cpp

indra/newview/llviewerjointmesh_vec.cpp