[gtk+] (17 commits) Non-fast-forward update to branch wip/ebassi/gles

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'wip/ebassi/gles' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  797187f... gdk: Add GLES shaders
  6d3286a... gl: Add more OpenGL ES checks
  59cd1c6... glsl: Specify precision for GLES shaders
  67cb792... gdk: Use appropriate API on GLES
  43e253f... gl: Use the appropriate format on GLES
  4422b43... gl: Use the appropriate formats when reading buffers on GLE
  c2a12f5... gl: Tweak the swizzle for GLES texture fragments
  4ca69ad... wayland: Implement asking for a GLES context
  d6f51ab... wayland: Honour GDK_GL=gles on context creation
  f079039... wayland: Add debugging notes for EGL context creation
  e19e8b1... wayland: Bind the appropriate OpenGL API
  6d227f8... x11: Allow creating GLES contexts
  3ac642b... tests: Add GLES shaders to testglarea
  01dee35... tests: Add precision to the GLES shader
  fda0d8e... tests: Add GLES support to GtkGears
  eadf7e9... demo: Add GLES support to the GtkGLArea demo
  e5f3a0f... glarea: Relay the use-es flag to context creation
  b33d0ca... docs: Clarify the platform-dependency of GdkGLContext:use-e
  21fddde... docs: Add new GdkGLContext symbols
  bef18ee... docs: Add new GtkGLArea symbols

Commits added to the branch:

  73dd63e... gdk: Add GLES shaders
  eda1bd6... gl: Add more OpenGL ES checks
  a2d4697... gl: Use the appropriate format on GLES
  01c8f0e... gl: Use the appropriate formats when reading buffers on GLE
  cea1bc9... gl: Tweak the swizzle for GLES texture fragments
  e674701... wayland: Implement asking for a GLES context
  4632405... wayland: Honour GDK_GL=gles on context creation
  c90cc49... wayland: Add debugging notes for EGL context creation
  fafba04... wayland: Bind the appropriate OpenGL API
  bb1ea5a... x11: Allow creating GLES contexts
  85a0d88... tests: Add GLES shaders to testglarea
  3fa818d... tests: Add GLES support to GtkGears
  998117b... demo: Add GLES support to the GtkGLArea demo
  edd4cd1... glarea: Relay the use-es flag to context creation
  9a867de... docs: Clarify the platform-dependency of GdkGLContext:use-e
  9c851a4... docs: Add new GdkGLContext symbols
  545af8b... docs: Add new GtkGLArea symbols