Add kv queue to google drive / google cloud storage sync handlers

Change-Id: I978ae42dbc6ce2840071cbadaf9351498a23415f
Diskpacked: support deletion

Delete from index and zero out blob's data.
Use FALLOC_FL_PUNCH_HOLE if available (linux >= 2.6.38).

Change-Id: I0c194fd6734a35b520212398d93dfdc5cabadeb5
UI: reset search session data if empty result.

http://camlistore.org/issue/352

Change-Id: I085c744a8ca31c4420f8132c897305c548b0483e
Merge "UI: reset search session data if empty result."
Merge "Diskpacked: support deletion"
Add kv queue to google drive / google cloud storage sync handlers

Change-Id: I978ae42dbc6ce2840071cbadaf9351498a23415f
Merge "Add kv queue to google drive / google cloud storage sync handlers"
importer: use context.Context instead of Interrupt type

Change-Id: I79f93c6a14934320022b90500d926453e614d001
Minor cleanup to importer README files.

Change-Id: Id37ed68b5b8eefe9bc0011452a0e41f70466d87b
Merge branch 'master' of https://camlistore.googlesource.com/camlistore
Merge branch 'master' of https://camlistore.googlesource.com/camlistore