Add echarts API
Use non-min for debug
improve converting data frame to echarts options
Add boundaryGap options for Axis
Handle area and scatter for echarts
Support for bar and groupedbar
chart with echarts in JavaScript
Chart type pie
Remove useless JavaScript
Delete and modify for the changes. Remove vega/vicent related things.
Handle pie smarter
Table chart works now.
Remove useless vega.jinja template
Show name on table chart
Use d3 for crossfilter
Fix pie style
Hide pie lables
Add label formatter for yAxis
fix echart resize bug
adjust chart offset