New feature: Support multiple series bar chart in combined xy chart

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What steps will reproduce the problem?
Define 3 series (2 bar chart series, 1 line chart series) in a dataset for a 
combined XY chart like this:
ChartFactory.getCombinedXYChartView(ctx, dataset, renderer, new String[] { 
BarChart.TYPE, BarChart.TYPE, LineChart.TYPE });

What is the expected output? What do you see instead?
Bar charts with multiple data series are not displayed properly in 
CombinedXYChart, the series overlap each other.

Current view: http://i.imgur.com/71HAPo3.jpg
Expected view: http://i.imgur.com/Jxq0BTV.jpg

What version of the product binary library are you using?
1.2.0

Please provide any additional information below.
The attached patch will enable the support of this feature.
Basically I extended the constructor with a more detailed chart type Definition 
which is used to properly build the data series and renderer for each chart.
I also extended the demo chart CombinedTemperatureChart to demonstrate the 
usage.

Original issue reported on code.google.com by stefan.f...@gmail.com on 11 Dec 2013 at 4:14

Attachments:

• patch.txt

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Thanks for the awesome contribution to AChartEngine.

Original comment by dandrome...@gmail.com on 7 Jan 2014 at 10:46

• Changed state: Fixed

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Original comment by dandrome...@gmail.com on 7 Jan 2014 at 10:47

• Changed state: Fixed