# 0.3 to 0.4
## Major changes
* Added Lenses
* Added Plugins
## newly exported functions
* simpleAuth
* jid (QuasiQuoter)
* presenceUnsubscribed
* associatedErrorType
* mkStanzaError
## major bugs fixed
* Didn't check jid of IQResults
## incompatible changes
### IQ
* sendIQ returns an STM action rather than a TMVar
* sendIQ' takes a timeout parameter
* removed IQResponseTimeout from IQResponse data type
* renamed listenIQChan to listenIQ and changed return type from TChan to STM
* renamed dropIQChan to unlistenIQ