[gegl] (8 commits) Created branch soc-2011-warp

[Michael Murà <mmure src gnome org>]

The branch 'soc-2011-warp' was created.

Summary of new commits:

  a03125a... add a buffer-cache op in the workshop
  2a212a8... configure.ac: add a check for rint, and define HAVE_RINT ac
  52e9341... gegl_buffer_dup: implement copy on write
  5159a21... simplify gegl_buffer_tile_iterator by removing unneeded cod
  a7cab1b... gegl_tile_iterator: simplify again and remove a goto
  8a79b1f... gegl_buffer_dup: use the cache to insert duplicated tiles
  a341c3b... gegl:warp: add code to test copy on write
  39c8c6f... implement support for format_n buffer in the nearest neighb