* gegl/graph/Makefile.am:
* gegl/operation/Makefile.am:
* gegl/graph/gegl-node.[ch]: made operation contexts be stored in a
hash table.
* gegl/graph/gegl-operation-context.c:
* gegl/graph/gegl-operation-context.h: moved these ...
* gegl/operation/gegl-operation-context.c: ... here.
* gegl/operation/gegl-operation-context.h: also made the set_rect
functions take rectangles as the argument.
* gegl/operation/gegl-operations.c:
* gegl/process/gegl-cr-visitor.c:
* gegl/process/gegl-debug-rect-visitor.c:
* gegl/process/gegl-eval-visitor.c: fixed include path.
* gegl/process/gegl-processor.c: fix include path, updated api use.

svn path=/trunk/; revision=2474