runAsChild: s/Fatal/Fatalf/

Change-Id: Icda2322368a5acbbd18d3d19ffe0fe716ced29cb
Add generation support for diskpacked.

Refactor the localdisk, diskpacked common code to pkg/blobserver/local
(only StorageGeneration, ResetStorageGeneration in this CL)

Change-Id: Ib04125805d5a1960bd29a474d3fc7ca985708d8d
use syncutil.Group and syncutil.Gate for paralellizing blobserver stats/removes

- where TODO exist.

Change-Id: If7340cf3bfcd5f5211f646404312c2fd15947bd9
Merge "Add generation support for diskpacked."
Merge "runAsChild: s/Fatal/Fatalf/"
localdisk: update failing test's style.

doesn't fix test though.

Change-Id: I5fcca5abbc6b71cfde1a1816b8b8915ca122e644
Fix data races added in 161fc061d3106ef8fab81bbb823f8d2692d5b712

Change-Id: I7167472de3778fc76cc54dff6c864ed43b2052e9
diskpacked: re-use fds when possible when reading blobs from pack files.

We could actually do better than this and use the fd already open
from the still-appending file, or just keep one fd open per pack
file.

But this is a start.

Change-Id: I164a9bdf44987c3f057872cc7fdee1735f9e89a9
Merge branch 'master' of https://camlistore.googlesource.com/camlistore into media
add tmdb tests