Merge tag '1.4.0' into develop

Release 1.4.0
changed default image for image with instructions
misuse of local variable
misus of local variable
clean the client images queue on flip because images got loaded in spite of new photo arriving. This was delaying playback
now I clear the client images queue on photo socket event
fixed misuse of socket.join. Now I set up everything on the join callback
bumped package.json version
updated changelog
Merge branch 'release/1.5.0'