doxygen: entry for gpu, modifiers, nodes, python and render

doc/Doxyfile

doc/doxygen.main

source/blender/gpu/GPU_buffers.h

source/blender/gpu/GPU_draw.h

source/blender/gpu/GPU_extensions.h

source/blender/gpu/GPU_material.h

source/blender/modifiers/MOD_modifiertypes.h

source/blender/nodes/CMP_node.h

source/blender/nodes/SHD_node.h

source/blender/nodes/TEX_node.h

source/blender/python/BPY_extern.h

source/blender/python/generic/blf_py_api.h

source/blender/render/extern/include/RE_pipeline.h

source/blender/render/extern/include/RE_render_ext.h

source/blender/render/extern/include/RE_shader_ext.h