index: Index MusicBrainz album IDs from music files.

Index "MusicBrainz Album ID" ID3v2 frames as
"musicbrainzalbumid" media tags to facilitate downloading
cover art from coverartarchive.org.

Change-Id: Ie81017dd6f76ec355ee0d1daedfb7180cb70ad59
pkg/misc/amazon/s3: Fix test broken by commit bf8d6bdb.

Commit bf8d6bdb (s3: auto-select correct region, handle buckets with
dots in hostname) changed the definition of s3.Client replacing the
second field, which was of type *http.Client, with a field of type
http.RoundTripper. But the test utility function getTestClient() was
not modified accordingly. Fix this to make `go test' in
pkg/misc/amazon/s3 succeed again (without this fix the test fails to
build).

Change-Id: Ida383e2050e215cc2446303c0ce59aa7ab6e7981
search: fix broken describe tests
devcam review: submit changes for review

Context: http://camlistore.org/issue/408

Change-Id: I587de65c9dc8d87c02541096e1f4f7765e644962
Merge "devcam review: submit changes for review"
Merge "index: Index MusicBrainz album IDs from music files."
importer: periodic import

Change-Id: Id324890833cb8f5672a0fa3a8df342dc05e6298c
Merge branch 'master' of https://camlistore.googlesource.com/camlistore
pkg/test: move importers' fakeTransport to test.NewFakeTransport

Change-Id: Iadefb6358983c0d479b269de47d368abf5e0c93b
test: add forgotten file from 94ab7a8

Change-Id: Ied44257d300d55b6b65daedf8f8ebd1a407d53a9
Rewrite Picasa importer for the new Importer API

Reorganizes some common things with Foursquare.

Needs thorough review: several FIXMEs and TODOS included!

Change-Id: I0789f4732412aa559078ec2c6b6797925ab8cd05