api: allow querying chart range
Changed .class properties to ['class'] to prevent IE8 JS errors, IE8 treats class as an identifier instead of a property
fix for d3 require compatibility in component
lock to 3.4.4
resolved conflicts with upstream
mbostock taged with v3.4.4 not 3.4.4
Fix the boundary of x domain when zooming - #505
Fix x and index of tooltip.show API - #509
Add axis.x.extent option instead of axis.x.default - #512
Use svg instead of png to get better image quality
Fix legend position to be centered - #515
Refactor data.onclick
Fix grid and region when arc tyle - #518
Fix update x domain for flow
Fix update x domain for flow
Fix event rect when flow called - #520
Fix connect_null to connectNull - #516 #81
Restore axis.x/y/y2.tick.outer
Regard isMultiple = true when data.xs is specified even if it has only one element - #522 #526
Fix select for arc - #523