add new errorbar plot (now draws in the trace layers)
add new errorbar plot (now draws in the trace layers)

etpinard/plotly.js,iongroup/plotly.js,asolagmbh/plotly.js,plotly/plotly.js,etpinard/plotly.js,aburato/plotly.js,iongroup/plotly.js,plotly/plotly.js,plotly/plotly.js,asolagmbh/plotly.js,asolagmbh/plotly.js,iongroup/plotly.js,etpinard/plotly.js,plotly/plotly.js,aburato/plotly.js