First fixes to io-->core inter-communication
Add_backend() blank strings
add get_stats proxy view
add loadavg proxy view
fix issues with io-core intercommunication

log in at start up, save useful data temporarily in
request.registry.session, send auth flag nicely to js
Fix import mist.io.model in views.py
try to connect with key in case it is already deployed
Add general exception to associate_key and not specifically
MachineUnautorized
make shell autoconfiguration search for username in other associated keys for same machine
Merge branch 'chaos.io.tmp' into chaos.io