1.5 - May 2013

Deprecated reconnectAutomatically, which is now ignored. Pusher will now try and reconnect automatically whenever possible by default, based on the error code returned by Pusher as defined in the latest Pusher protocol.
Generally improved reconnection strategy.
Added a global Pusher.h header file to reduce the number of imports needed
Added pusher:connectionWillConnect: delegate method.
Deprecated pusher:willAuthorizeChannelWithRequest: delegate method, replaced with pusher:willAuthorizeChannel:withRequest:.
Bumped Pusher protocol to version 6.
Removed support for iOS4.
Switched to latest SocketRocket backend, improved threading issues

1.4 - October 2012

This will be the final release to support iOS4.
Support for ARMV6 has been removed.
An authentication error delegate message will be called if your auth server does not return an NSDictionary. (#40)
Generally improved error handling and notification for private channel authentication.
Deprecated -[PTPusher unsubscribeFromChannel] in favour of -[PTPusherChannel unsubscribe]. (#43)
Added some utilities to make unit testing against Pusher easier (such as a mock connection class).
Reverted subtle change in behaviour introduced in 1.3, where delegate would be notified that the connection was open before the handshake event was received, meaning the socket ID would no longer be available at this point. (#47)
Allow all bindings to be removed from the client/channel with a single method call. (#28)
Fixed numerous bugs around SocketRocket callbacks and integration.
Fixed various memory management issues.

Switched to using NSJSONSerialization by default for JSON parsing (see JSON notes).
Bubble up any authorization connection errors to the Pusher delegate (#30)
Ensure channel auth delegate methods are fired when authorization fails. (#30)
Ensure connections can always be re-opened after a failure. (#32)
Handle members added to a presence channel that have no user info. (#31)

Changed backend socket library to SocketRocket
PTPusherEvent objects have a timeReceived property.
Updated to the latest version of JSONKit.
Re-added armv6 archicture for iOS 4.0 - 4.2 support.
HTTP authorization for private/presence channels now accepts a HTTP 201 status as well as 200 (#23).
Fixed triggering of client events (would previously send the channel name as the event name).
Fixed retain cycle between PTPusher and PTPusherChannel.
OSX framework is now called Pusher.framework.
Project has been converted to use ARC (Automatic Reference Counting).
All event binding methods return a PTPusherEventBinding object, which can be used to remove bindings (see "Removing Bindings" below).
Channels should be removed from the cache when they are unsubscribed (#25).
Subscribing to multiple private channels would fail as only the first channel would send the authorization request (#26).
Wait for handshake and socket ID to be received before attempting to connect to channels as the socket ID is required for private/presence channel authorization.