Revert "Revert "Add genconfig support for flickr importer""

This reverts commit 8367de6e95655a65c8e063a1c4fd4d2a059763a8.

Change-Id: I1fdfa4070572b1badc0f0980348404f905fa13a3
Grab the userID from the flickr oauth handshake.

Remove the mutex from auth.go because I believe the
mutex in importer.go should guaranteeing only one
flickr importer is running at a time.

Change-Id: Ice971c6c041cf21fdb2bc93cb15f861dd1c8c1d7
index: change GetOwnerClaims interface for efficiency, rename to AppendClaims

Change-Id: Icec235961ed8a09256df87c5fe1455cbad81ae3f
Merge branch 'master' of https://camlistore.googlesource.com/camlistore