Documentation is partly written, but not complete enough to have any value yet: all that's currently available is the examples provided in the /Examples folder. Those examples are probably your best current source for information.
I'm hoping that I'll get some volunteers at the PHPNW13 hackathon in a few weeks time to help develop some charting wizards to simplify the task of building new charts, and editing existing charts; though that will probably be too late for your current urgency
I'm hoping that I'll get some volunteers at the PHPNW13 hackathon in a few weeks time to help develop some charting wizards to simplify the task of building new charts, and editing existing charts; though that will probably be too late for your current urgency