Add contributor and changelog entry

docs/CONTRIBUTORS.rst

@@ -13,14 +13,17 @@ Contributors (Pillow)
 - Daniel Hahler <github __at__ thequod.de>, developer
 - David Schmidt <david.schmiddi.86 __at__ gmail.com>, developer
 - Eliot <saltycrane __at__ gmail.com>, developer
+- etienne <etienne.desautels __at__ gmail.com>, developer
 - Jannis Leidel <jannis __at__ leidel.info>, developer
 - Kyle MacFarlane <kyle __at__ deletethetrees.com>, developer
 - Lars Yencken <lars __at__ yencken.org>, developer
+- Liu Qishuai <lqs __at__ lqs.me>, developer
 - Manuel Ebert <Maebert __at__ UOS.de>, developer
 - Marc Abramowitz <marc __at__ marc-abramowitz.com>, developer
 - Matti Picus <gitmatti __at__ picus.org.il>, developer
 - Mikhail Korobov <kmike84 __at__ gmail.com>, developer
 - OCHIAI, Gouji <gjo.ext __at__ gmail.com>, developer
+- Oliver Tonnhofer <olt __at__ bogosoft.com>, developer
 - Phil Elson <pelson.pub __at__ gmail.com>, developer
 - Sandro Mani <manisandro __at__ gmail.com>, developer
 - Simon Law <simon.law __at__ ecometrica.com>, developer
@@ -29,7 +32,5 @@ Contributors (Pillow)
 - Tom Gross <tom __at__ toms-projekte.de>, developer
 - Tom Payne <twpayne __at__ gmail.com>, developer
 - Tyler Garner <garnertb __at__ gmail.com>, developer
-- etienne <etienne.desautels __at__ gmail.com>, developer
 - tdesvenain <thomas.desvenain __at__ gmail.com>, developer
-- Liu Qishuai <lqs __at__ lqs.me>, developer
 - wiredfool <eric-github __at__ soroos.net>, developer

docs/HISTORY.txt

@@ -13,6 +13,9 @@ Changelog (Pillow)
 - Add experimental Tiff G3/G4 support.
   [wiredfool]
 
+- Backport PIL's PNG/Zip improvements: add new FASTOCTREE quantizer with alpha support, make ZIP compress level and type configurable, support reading/writing PNGs with paletted alpha.
+  [olt]
+
 - Many other bug fixes and enhancements by many other people (see docs/CONTRIBUTORS.txt).
 
 1.7.8 (2012-11-01)