Changes since version 0.10.4

# Major update

* switch to Venus protocol version 1.0.0
* drop experimental tag from Venus configuration flag and update API
* Improve win32 support
* Support passing fences from guest to host for waiting
   and inter-context fence sharing/syncing

# New features

## Venus

* add support for
   
  - VK_EXT_border_color_swizzle
  - VK_EXT_color_write_enable
  - VK_EXT_dynamic_rendering_unused_attachments
  - VK_EXT_fragment_shader_interlock
  - VK_EXT_image_2d_view_of_3d
  - VK_EXT_memory_budget
  - VK_EXT_mutable_descriptor_type
  - VK_EXT_non_seamless_cube_map
  - VK_EXT_pci_bus_info
  - VK_EXT_shader_subgroup_ballot
  - VK_EXT_vertex_input_dynamic_state
  - VK_KHR_push_descriptor
  - VK_KHR_shader_clock
  - VK_KHR_synchronization2

* Enable  render server by default for Venus

## Virgl

On hosts supporting OpenGL 4.6 the guest can now also support OpenGL 4.6. 

* Add support for 
  - EXT_texture_shadow_lod
  - EXT_texture_sRGB_rg8
  - AMD_vertex_shader_viewport_index
  - ARB_draw_parameters
  - ARB_shader_group_vote 
* Enable noperspective interpolation on GLES if the host supports it
* Emit GL_BUFFER_UPDATE_BARRIER_BIT and  GL_TEXTURE_UPDATE_BARRIER_BIT when needed
* Fix handling of images when used in various shader stages

## Video

* Add support for H.264, H.265 encoding
* Add support for AV1, hevc10bit, vc1, jpeg, and mpeg2 decoding 

# Further changes 

* lots of security fixes that were unearthed by fuzzing
* Improve code quality based on Coverity testing

For detailed changes please take a look at the git log.