New webpack export will break eon-chart builder because flaten function was removed

[ianjennings]

Here is the original flatten function:

eon-chart/src/pubnub-c3.js

Line 464 in 3cc2cf0

flatten: function(ob) {

[ianjennings]

This may be helpful:
https://github.com/webpack/webpack/tree/master/examples/multi-part-library

[ianjennings]

It's also possible to bundle the flatten code within the builder example. It's not important for the normal library.