Fixed bk.updateThisOutput for node plugin
When resuming a existing session, ensure firebase cached outputs are reconnected
Add sessionId to the firebase space
Make bk_out available in ipython plugin
Make ipython update result in firebase
Make _out available as bk_out and _last as bk_
Integrate the new chart output display
Do not display '_out[]=' in UI if no index
Minor improvement to charting api
Add BkTable to Node plugin
Increase groovy eval timeout for demo purpose