Merge pull request #61 from jpetazzo/master

Update CMD in all busybox images (thank you @tianon!)

library/busybox

@@ -1,8 +1,8 @@
 # maintainer: Jérôme Petazzoni <[email protected]> (@jpetazzo)
 
-buildroot-2013.08.1: git://github.com/jpetazzo/docker-busybox@02a13fddf5fa8e1c0e1427526dd89f63be918234
-buildroot-2014.02: git://github.com/jpetazzo/docker-busybox@d595e94020a3a420a05d4531cf8f75b71a3fd8e8
-latest: git://github.com/jpetazzo/docker-busybox@d595e94020a3a420a05d4531cf8f75b71a3fd8e8
-ubuntu-12.04: git://github.com/jpetazzo/docker-busybox@b03e2e24dfca86b2223a6e493a649b699c460e99
-ubuntu-14.04: git://github.com/jpetazzo/docker-busybox@93811b9206948a2bc38679ffff4af8a2267aa8c7
+buildroot-2013.08.1: git://github.com/jpetazzo/docker-busybox@220a689ce359914af3e08a698d1d74ec7aa0a444
+buildroot-2014.02: git://github.com/jpetazzo/docker-busybox@91641afe424df5e838bac254d43e09f051ab8c3e
+latest: git://github.com/jpetazzo/docker-busybox@91641afe424df5e838bac254d43e09f051ab8c3e
+ubuntu-12.04: git://github.com/jpetazzo/docker-busybox@4f6cb64c3b3255c58021dc75100da0088796a108
+ubuntu-14.04: git://github.com/jpetazzo/docker-busybox@ca435164f45c40d761fad9ef9b5a76a6ba0d5f1a