Core:

Allow specifying ping interval, thanks to @Cataractar
Connect behind http proxy support, thanks to @dinhoabreu

Protocol:

Updated s40 tokens
Updated android token, thanks to @dedmen
Audio and video receive support, thanks to @aesedepece
Fixed receive presence, thanks to @aesedepece
Get contact's profile picture, thanks to @aesedepece
Handle calls, thanks to @aesedepece
Fixed ack errors, thanks to @aguiraf
Propagate StreamFeaturesProtocolEntity to upper layers, thanks to @ant9000
Fixes to incoming receipt, thanks to @prasselpikachu
Group info v2, thanks to @ant9000
Don't stream error on web notifications, thanks to @aesedepece

Demos:

Fixed keys_get in cli demo, thanks to @tvandergeer
Fixed invite to group in cli demo
Added kick from group in cli demo

Core:

Fixed problem reading identity which caused reg error
Keep connection alive through perioding pinging, thanks to @galmeida
Fixed compatibility with the whole python 2.6-3.4 spectrum
Added StackBuilder to make stack construction easier

Protocol:

Distinguish received delivered and read receipt, thanks to @NickCis
Fixed leave groups, thanks to @[email protected]
Added Profile Layer
Added participants to a group, thanks to @emamirazavi
Fixes to registration, thanks to @aesedepece
Updated S40 registration token
Save next challenge and use in next auth, thanks to @samiexa
Get contact profile picture, thanks to Jamie Gloudon

yowsup-cli and demos:

Fixed groups jid handling in sendclient, thanks to @fire855
Fixed readline redundant dependency in linux, thanks to @NickCis
Added group_invite in cli demo to add participants to a group, thanks to @emamirazavi
Added leave_group to cli demo

Update summary in no particular order:

General:

 - As of January 2015, Yowsup is GPLv3 licensed (previouly was MIT)

Protocol Specific:

 - Experimental Axolotl support (end-to-end encryption)
 - Upload and send images
 - Fixed broadcast (thanks to mgp25)
 - Fixed registration no_routes error
 - Initial support for groups v2

Core:

 - Easy switch/ add new enviornment (S40/Android ..etc)
 - Added _sendIq in YowProtocolLayer and YowInterfaceLayer with callbacks for Iq result and error
 - Updated registration token

yowsup-cli/demos:

- Added new send and exit demo
- Added E2E encryption in yowsup and echo client demos
- Added image_send to yowsup demo

Update summary in no particular order:

Protocol Specific:
 - Upgraded to WA 1.5
 - Fixed previews in images
 - Pass pongs to upper layers
 - Add chatstate support (typing/ paused), thanks to galmeida
 - Added support for send/recv location, thanks to felix-dumit
 - Added support for send/recv vcards, thanks to uelhav
 - Added potential fix for not receiving registratio sms
 - Ack notifications

Core:
 - Write date to socket as they come, thanks to galmeida
 - Parallels layers now get events sent by siblings
 - Broadcast event on login

yowsup-cli/ demos:
 - Added send typing/paused state to cli demo
 - Echo demo now echoes images, thanks to felix-dumit
 - Echo demo now echoes vcards, thanks to uelhav
 - Fixed readline/pyreadline dependency problem

Minor bug fixes

yowsup 2.0

Legacy yowsup 0.90