[gegl] doc: update features list with thread capabilities

[Øyvind Kolås <ok src gnome org>]

commit b975b23d618a0ebd256c5ca027200cb5ef9c6317
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue Jul 1 08:30:52 2014 +0200

    doc: update features list with thread capabilities

 docs/features.txt |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/docs/features.txt b/docs/features.txt
index 52fa8fa..bcbcd85 100644
--- a/docs/features.txt
+++ b/docs/features.txt
@@ -11,14 +11,15 @@ GEGL Feature List
      * Iterative chunk-wise processing.
      * Processes subregions and dependencies.
      * Subgraph caches to aid performance of non-destructive editing.
+     * Multi-threaded processing.
      * Experimental OpenCL acceleration, with possibility of hybrid cpu/gpu
        processing.
   - link:api.html#GeglBuffer[GeglBuffer]
      * Storage of all babl supported formats.
-     * Tiled sparse buffers (larger than RAM images).
+     * Sparse swapped buffers (larger than RAM images).
      * linear buffers (allocated internally or from external allocation.)
      * On demand tiled mipmapping.
-     * inter process shared storage
+     * Thread-safe reading/writing.
      * External tile-backends (allow wrapping other tiled buffer systems
        to use them through the GeglBuffer API).
   - Operations