Allow results of -getAllDocuments to be used in -attachmentsForRev:...

-attachmentsForRev:... makes use of the sequence number, which
wasn't added to the TD_Revision by -getAllDocuments.
Allow comparing attachments of documents in a local and remote db
Add test for creating lots of local attachments and replicating
Add a rake command to pod update all projects
Add further attachment tests to ReplicationAcceptance

testAddLocalReplicateDeleteLocalReplicate checks that deleting an
attachment from a local document that's already been replicated
remotely is replicated during a future replication.

testReplicateRemoteDocumentUpdate tests that updates to an
attachment are replicated correctly.

testReplicateRemoteDocumentDeleteLocalCheckReplicated tests that
deleting an attachment is replicated correctly.

testReplicateRemoteDocumentDeleteRemoteCheckReplicated tests that
deleting a remote attachment is replicated correctly.