Subchart incompatible with intializing charts without "bindto"

[mattty]

I use the solution outlined in #382 to render multiple charts on one page.

When experimenting with adding a subchart, I noticed that these seem to be incompatible.

When using the $('#id').append(chart.element); method, the subchart renders, but the event listeners that bind to the brushes are not bound correctly. Switching to the bindto method makes the bug disappear.

[masayuki0812]

Thank you for reporting. You're right, and I fixed this issue by the commit above. I'll release this in the next version v0.4.11. Thanks!