masayuki0812/c3 — pull request #104 by hotzenklotz (2014-03-31 19:45:05+00:00)
Title: Fix for AMD define

Hi,

I ran into trouble when using C3 together with requirejs [optimizer rjs](http://requirejs.org/docs/optimization.html). To avoid this trouble the C3 module should explicitly declare d3 as a requirement. This simple PR will fix this.