[New feature] onComplete

[dmachehin]

Need callback option: onComplete

[martynasma]

Added in 1.0.1

• Added "complete", "load" and "error" properties that can be set with function handlers to be invoked on load completion, successful file load or failed load respectively

[markedmondson]

It'd be really useful to have the chart object available in these callbacks. Eg:

callFunction( options.complete, chart );

[martynasma]

Done. Thanks!