Add ReplicationAcceptance project.
Test 1-rev 100k doc pull and push replication.
Add tests for replicating single doc with large rev tree.
Add pull-modify-push and pull-deleteAll-push tests.
Add checks for replicating while adding documents.
Add -getAllDocuments and -conflictsForDocument to CDTDatastore

These are required to allow checking the similarity of a remote
CouchDB database and a local database.
Add methods for tests to compare local and remote databases
Add test that checks conflicts are correctly replicated
Add comments on the compare functions
Move CRUD operations to their own category.
Test replicating a conflicted database to a new database.
Use -enumerateObjectsWithOptions:usingBlock to try to speed up checks
Pull in couchbase-lite-ios/c2d098e5577f3f7c16892a6c8f4357b93a68119a

ReplicationAcceptance tests indicate it doesn't altogether prevent
the warning mentioned in the commit.
Add comments to each test and pertinent variables.
Remove pod-specific build phases from ReplicationAcceptance project
Update command lines for ReplicationAcceptance projects.