Modified conf.py for release 0.2.6
Modified conf.py for release 0.2.6

asakusafw/asakusafw-sandbox,akirakw/asakusafw,akirakw/asakusafw,cocoatomo/asakusafw,asakusafw/asakusafw-sandbox,asakusafw/asakusafw,cocoatomo/asakusafw,ashigeru/asakusafw,asakusafw/asakusafw-sandbox,asakusafw/asakusafw,ashigeru/asakusafw