Add osten mouse atlases

osten_mouse_100um_v1.0.tar.gz

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+/annex/objects/MD5-s139225001--247ad81b14e4fc6b2b59abdd8bfb2548

osten_mouse_10um_v1.0.tar.gz

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+/annex/objects/MD5-s15463227--7f739164028495b1361bff0594720562

osten_mouse_25um_v1.0.tar.gz

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+/annex/objects/MD5-s180542611--590f75fcfa8d1bbed84e8c6f77ce8ac0

osten_mouse_50um_v1.0.tar.gz

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+/annex/objects/MD5-s98662367--7fe35cc7094f9eba27d6122b59f21b16