Support color normalization for pie chart (color property for serie/values)

[GoogleCodeExporter]

currently :
series : { root : { values : [
 { color : 'red' },
 { color : 'green' },
 { color : 'blue' },
] }},
doesn't work and we are forced to use:
series : { root : { values : [
 { color : 'red', plotProps : { fill : 'red' } },
 { color : 'green', plotProps : { fill : 'green' } },
 { color : 'blue', plotProps : { fill : 'blue' } },
] }},

We could do like line and bar chart and simply inherit pie colors from the 
"color" property if not defined differently.

Original issue reported on code.google.com by stefano....@gmail.com on 23 Jan 2014 at 9:12

[GoogleCodeExporter]

In order to correctly support this I had to rewrite the whole "color" logic so 
to compute it while drawing instead of the "configuration" phase.

Each plugin now computes derived properties on its own and the option struct is 
unchanged.

Original comment by stefano....@gmail.com on 23 Jan 2014 at 4:58

• Changed state: Fixed