[cogl] (33 commits) Non-fast-forward update to branch wip/rig

[Robert Bragg <rbragg src gnome org>]

The branch 'wip/rig' 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:

  3f6c0c1... check if we need to explicitly link with a libiconv library
  bdd61ba... Update Cogl description in README.in
  39785fc... update cogl.doap
  a4abd2b... Remove some leftover references to Clutter
  e160267... sdl2: fix GL driver selection
  fcf42f0... Enable building without gtk-doc, e.g. on OSX
  d75dac4... basic-video-player: don't try and sample mipmap
  ff112da... cogl-gst: add cogl_gst_video_sink_get_natural_size() api
  8266a8a... framebuffer: update docs for _get_depth_texture()
  324fbc2... bitmap-conversion: Avoid using _COGL_GET_CONTEXT()
  41e6cba... blend-string: Expose internal test code as unit test
  e7fad38... blend-string: Avoid using _COGL_GET_CONTEXT
  d6928b5... texture-pixmap-x11: avoid depending on _GET_CONTEXT
  e35ec38... xlib: remove deprecated apis
  48a251c... bitmap: avoid unsigned int
  f007757... texture: make some texture vfuncs optional
  91d084f... Remove OpenGL ES 1.1 support
  b42fb5c... Remove ARBfp support
  ac232ff... Remove support for GL's legacy fixed function apis

Commits added to the branch:

  48c8833... check if we need to explicitly link with a libiconv library
  a65a5e6... Update Cogl description in README.in
  e74fa29... update cogl.doap
  6939cf3... Remove some leftover references to Clutter
  b69470a... sdl2: fix GL driver selection
  1ba2397... Enable building without gtk-doc, e.g. on OSX
  98b4fc0... basic-video-player: don't try and sample mipmap
  5db4166... cogl-gst: add cogl_gst_video_sink_get_natural_size() api
  6b385bd... framebuffer: update docs for _get_depth_texture()
  ecc84ba... bitmap-conversion: Avoid using _COGL_GET_CONTEXT()
  4c4d90f... blend-string: Expose internal test code as unit test
  6e69b69... blend-string: Avoid using _COGL_GET_CONTEXT
  3a8ce32... texture-pixmap-x11: avoid depending on _GET_CONTEXT
  02502db... xlib: remove deprecated apis
  99d726a... bitmap: avoid unsigned int
  0ca9c3b... texture: make some texture vfuncs optional
  3cb6bc5... Remove OpenGL ES 1.1 support
  7475ef6... Remove ARBfp support
  1afe016... Remove support for GL's legacy fixed function apis
  e1c0d7c... pango: include cogl-texture-private.h for _get_format() api
  7856a3d... pipeline: don't free BigState before we might dereference i
  546f9dd... fragend-glsl: avoid re-getting the shader state
  c79c348... gl: consider min glsl ver. of 1.3 with GL 3.1 core profile
  e952cc3... support glsl >= 1.3 with varying/attribute deprecated
  8c64ed3... ulib: fix linking with libiconv if required
  49b241a... Rename ulib to clib ready for merging into rig
  86f93fc... Add cogl_poll_renderer_dispatch_fd api
  acedb39... Add a COGL_EXT_IN_GLES3 option to specify extensions that a
  0a87877... Use the EGL_KHR_surfacless_context extension
  f9df324... Remove support for CoglTextureRectangle
  aa2655e... test-utils: support testing with sdl
  df37bfe... sdl2: return a CoglError instead of calling c_error
  fea7666... emscripten: rely on emcc's EMSCRIPTEN define