add session-based auth to sockets
slight front-end cleanup, clear client id on clientside if socket drops, check for active client id before emitting events on client side
Update README.md
add price checking, update socket connection state on front-end in all tabs
Merge branch 'master' of https://github.com/bioid/blender-brenda-master
Merge pull request #6 from bioid/master

add session-based auth to sockets