echoing images as well as text messages

Signed-off-by: Felix Dumit <felix.dumit@gmail.com>
chatstate support
small typo fix
fix duplicate receipt

Signed-off-by: Felix Dumit <felix.dumit@gmail.com>
tests for chatstate
immediately write output data to socket
Repositioned comment
Merge branch 'felix-dumit-echo-images'
Merge branch 'master' of git://github.com/galmeida/yowsup into galmeida-master
Few fixes

Fixed Outgoing node creation
Added assertion for the composing state passed to constructor
Added constants for valid states
Merge branch 'galmeida-master'
Added Chatstate (typing/ paused) tx+rx in cli demo
Merge pull request #415 from galmeida/FULL_STACK_typo

small typo fix
Merge branch 'network_output_delay' of git://github.com/galmeida/yowsup into galmeida-network_output_delay
Merge branch 'galmeida-network_output_delay'
Merge branch 'master' of github.com:tgalal/yowsup
renaming CreateGroupIqProtocolEntity to CreateGroupsIqProtocolEntity
renamed package name to yowsup2 for pip
Merge pull request #439 from pungoyal/fixing-CreateGroupIqProtocolEntity-name

renaming CreateGroupIqProtocolEntity to CreateGroupsIqProtocolEntity
Merge branch 'master' of github.com:tgalal/yowsup