fs: handle directory permanode titles

Set corresponding permanode title on new root,
new directory and directory rename.

Change-Id: I5432e14ef57d6c0c5555b11e895e8b8ad6d8efcf
Merge "fs: handle directory permanode titles"
dockertest: skip test when DB in container not ready

http://camlistore.org/issue/474

Change-Id: Id65b3c35a2f38466c4d7370bad4c5f73a8cb22db
Merge "dockertest: skip test when DB in container not ready"
make 4sq data

Change-Id: I0f89f3ebcbe7ebec7bb69c7fd7934fca56eb87a7