Update docker-dev with the new v0.7.3 and v0.7.4 releases

library/docker-dev

@@ -1,5 +1,7 @@
 # maintainer: Tianon Gravi <[email protected]> (@tianon)
 
-latest: git://github.com/dotcloud/[email protected]
+latest: git://github.com/dotcloud/[email protected]
+v0.7.4: git://github.com/dotcloud/[email protected]
+v0.7.3: git://github.com/dotcloud/[email protected]
 v0.7.2: git://github.com/dotcloud/[email protected]
 v0.6.7: git://github.com/dotcloud/[email protected]