sending append flag to charts
changing default rendering to 1024x768
tweaking dimensions
changing to a pie chart
new method ready(), to check if a chart can be rendered
new util: extend()
#14 updating pie chart to a class structure
#14 changing the way charts are instantiated/requested
#12 checking data and schema through ready()
new util: toArray()
#12 automatically trying to find appropriate axis based on the type