Deferred pipeline integration of rigged attachments and cleanup.

indra/llrender/llvertexbuffer.h

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

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

...ew/app_settings/shaders/class1/deferred/avatarAlphaV.glsl

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

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

indra/newview/lldrawpoolavatar.cpp

indra/newview/lldrawpoolavatar.h

indra/newview/lldrawpoolbump.cpp

indra/newview/lldrawpoolbump.h

indra/newview/llviewershadermgr.cpp

indra/newview/llviewershadermgr.h

indra/newview/llvovolume.cpp