add 2-way Stat.Type <--> int mode convenience methods
Merge pull request #16 from radai-rosenblatt/master

add 2-way Stat.Type <--> int mode convenience methods
make Stat and FsStat serializable
Merge pull request #17 from radai-rosenblatt/master

make Stat and FsStat serializable
vfs-cache: do not use memoizeWithExpiration if cachelifetime is zero

ExpiringMemoizingSupplier uses zero as a special value

Acked-by: Albert Rossi
Target: master, 0.9
nfsv3: remove useless lookup and getattr on remove

Acked-by: Albert Rossi
Target: master, 0.9