Added unit tests for CBLMultipartDocumentReader, including gzip support
More MIME gzip encoding unit tests
Removed CBLReplication.propertiesTransformationBlock from public headers

The API hasn’t been through review, and it’s almost certainly subject to future change because
it doesn’t support attachments. We’ve decided it shouldn’t be exposed in a public header yet.
(See #251)

Clients can keep using it but they’ll need to declare it themselves, like:

@interface CBLReplication
@property (strong) CBLPropertiesTransformationBlock propertiesTransformationBlock;
@end
Fixed compiler error in Release build
Bumped version to 1.495 for beta 3
Code that demonstrates unexpected behavior with regards to completedChangesCount of replicator observer.
Fixed an assertion-failure when a _bulk_get download can’t parse a JSON doc

Fixes #232
Fixes #271
Merge branch 'replicator_observer_issue' of github.com:couchbase/couchbase-lite-ios
Don’t set replication progress to 0/0 when stopping

Instead the progress should remain the way it was.
Also, improved Traun’s great new test for verifying that progress counts make sense.
Fixes #274
Fixed a couple of minor warnings reported by Xcode 5.1