[cogl] (12 commits) Created branch wip/rib/master-next

[Robert Bragg <rbragg src gnome org>]

The branch 'wip/rib/master-next' was created.

Summary of new commits:

  f7e939c... build: only have libcogl-pango depend on pango
  1dbb89c... cogl: Add support for reading a cogl.conf config file
  57e33fd... ext-functions: Don't assume GLchar typedef
  db2a24d... stb_image: use glib sized types
  509911e... buffer: make the COGL_BUFFER casting macro public
  f5b6809... framebuffer: Adds a context getter for CoglFramebuffer
  4674456... framebuffer: avoid redundant calls to _init_bits
  ece9c0a... framebuffer: don't reference default fb in _clear apis
  1e5c39a... framebuffer: Make framebuffer_clear APIs public experimenta
  76a8af3... framebuffer: lazily allocate framebuffers as needed
  6657963... framebuffer: make _swap_region coords top-left relative
  474ce95... matrix: Add cogl_matrix_look_at