The icon does not match the others because the NuvolaX icon theme seems
to have vanished from the Internet. Ideally all those admin icons could
use a replacement. But that should be a different PR I guess.

This patch reduces the colorspace of GIF files and has optipng
optimization run on PNGs. Changes shouldn't be visible except in
filesizes.

Passed every png file through http://www.smushit.com/ysmush.it/ saving some 1-2kb of binary image data

Ignore-this: a0d2db2839de9eacbd6a853c39ed592c

This patch reorders the admin screen to make the main tasks better accessible.
This was inspired by a similar plugin by Håkan Sandell [1]

[1] http://www.dokuwiki.org/plugin:adminhomepage

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