New features:
OpenGL 3.1 support on freedreno (a3xx, a4xx)
OpenGL 3.3 support for VMware guest VM driver
(supported by Workstation 12 and Fusion 8).
GL_AMD_performance_monitor on nv50
GL_ARB_arrays_of_arrays on i965
GL_ARB_blend_func_extended on freedreno (a3xx)
GL_ARB_clear_texture on nv50, nvc0
GL_ARB_clip_control on freedreno/a4xx
GL_ARB_copy_image on nv50, nvc0, radeonsi
GL_ARB_depth_clamp on freedreno/a4xx
GL_ARB_fragment_layer_viewport on i965 (gen6+)
GL_ARB_gpu_shader_fp64 on r600 for Cypress/Cayman/Aruba chips
GL_ARB_gpu_shader5 on r600 for Evergreen and later chips
GL_ARB_seamless_cubemap_per_texture on freedreno/a4xx
GL_ARB_shader_clock on i965 (gen7+)
GL_ARB_shader_stencil_export on i965 (gen9+)
GL_ARB_shader_storage_buffer_object on i965
GL_ARB_shader_texture_image_samples on i965, nv50, nvc0, r600, radeonsi
GL_ARB_texture_barrier / GL_NV_texture_barrier on i965
GL_ARB_texture_buffer_range on freedreno/a3xx
GL_ARB_texture_compression_bptc on freedreno/a4xx
GL_ARB_texture_query_lod on softpipe
GL_ARB_texture_view on radeonsi and r600 (for evergeen and newer)
GL_ARB_vertex_type_2_10_10_10_rev on freedreno (a3xx, a4xx)
GL_EXT_blend_func_extended on all drivers that support the ARB version
GL_EXT_buffer_storage implemented for when ES 3.1 support is gained
GL_EXT_draw_elements_base_vertex on all drivers
GL_EXT_texture_compression_rgtc / latc on freedreno (a3xx & a4xx)
GL_KHR_debug (GLES)
GL_NV_conditional_render on freedreno
GL_OES_draw_elements_base_vertex on all drivers
EGL_KHR_create_context on softpipe, llvmpipe
EGL_KHR_gl_colorspace on softpipe, llvmpipe
new virgl gallium driver for qemu virtio-gpu
16x multisampling on i965 (gen9+)
GL_EXT_shader_samples_identical on i965.
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