small update to the trend-line and fixes to the line-and-dot example.
Give an example of a small multiple.
small multiple example.
Adding a stacked shape example, and fixed a bug whereby features which prepare the incoming data can break the expectations for features mixed in after it. Now, the data array is reverted to its pristine format before a feature is rendered.
Added a #clone() function which will clone a d4 chart and return a new instance. This is helpful if you want to create several custom charts, which diverge from each other in just a few ways. Additionally, fixed a bug in #extend() where arrays were not actually duplicated, but merely pointed to the original reference.
Working on a margin and height example.