Add "maintainer:" comment lines to all the existing library files

library/busybox

@@ -1 +1,3 @@
+# maintainer: Jérôme Petazzoni <[email protected]> (@jpetazzo)
+
 latest: git://github.com/jpetazzo/docker-busybox@02a13fddf5fa8e1c0e1427526dd89f63be918234

library/debian

@@ -1,3 +1,5 @@
+# maintainer: Tianon Gravi <[email protected]> (@tianon)
+
 latest: git://github.com/tianon/docker-brew-debian@e1b9de169b8e9c9fccd07a8c11ba1e4dbf832500
 wheezy: git://github.com/tianon/docker-brew-debian@e1b9de169b8e9c9fccd07a8c11ba1e4dbf832500
 7.3: git://github.com/tianon/docker-brew-debian@e1b9de169b8e9c9fccd07a8c11ba1e4dbf832500

library/hipache

@@ -1,2 +1,4 @@
+# maintainer: Sam Alba <[email protected]> (@samalba)
+
 latest: git://github.com/dotcloud/hipache@7362ff5b812f93eceafbdbf5e5959f676f731f80
 0.2.4: git://github.com/dotcloud/hipache@7362ff5b812f93eceafbdbf5e5959f676f731f80

library/registry

@@ -1,3 +1,5 @@
+# maintainer: Sam Alba <[email protected]> (@samalba)
+
 latest: git://github.com/dotcloud/docker-registry@8ed63716cc256ab2e3906222b6f0331a7a640a31
 0.5.9: git://github.com/dotcloud/docker-registry@debd567e95df51f8ac91d0bb69ca35037d957ee6
 0.6.0: git://github.com/dotcloud/docker-registry@ab2a346ae246b65eecc4e68bb91a2ec25ea7756e

library/ubuntu

@@ -1,3 +1,5 @@
+# maintainer: Tianon Gravi <[email protected]> (@tianon)
+
 latest: git://github.com/tianon/docker-brew-ubuntu@ba833691e33f5b671adb90a4c53676ad16ba8302
 precise: git://github.com/tianon/docker-brew-ubuntu@ba833691e33f5b671adb90a4c53676ad16ba8302
 12.04: git://github.com/tianon/docker-brew-ubuntu@ba833691e33f5b671adb90a4c53676ad16ba8302