added initial notifications
Fixes on notifications
Relocated ping app in INSTALL_APPS to avoid circular import problems
State.refresh now is executed in the current process because get_state does not need to patch anymore
State refresh MUST be executed in a task :( because gevent does not work in a single thread
Changed Node not available description
Added send email to users feature
COmment on state.refresh
Fixed PluginModel related manager
merging
Merge branch 'master' of git.confine-project.eu:confine/controller into local
Merge branch 'master' of git.confine-project.eu:confine/controller
Merge branch 'local'