Add support for AmRectangularChart for API, JSO, JSNI and JSON
Refactor design for event processing across dom and non-dom AmChartEvent
and AmChartDomEvent. (Pending)
Merge branch 'master' of https://github.com/sillysachin/GWTAMChart

Conflicts:
	src/com/amcharts/api/gen/APIWriter.java
	src/com/amcharts/api/gen/AttributeReader.java
	src/com/amcharts/api/gen/JSNIWriter.java
	src/com/amcharts/api/gen/JSONWriter.java
	src/com/amcharts/api/gen/JSOWriter.java
	src/com/amcharts/api/gen/SubClassJSNIWriter.java
	src/com/amcharts/impl/AmGraph.java
	src/com/amcharts/impl/AxisBase.java
	src/com/amcharts/impl/CategoryAxis.java
	src/com/amcharts/impl/ValueAxis.java
	src/com/appbootup/explore/gwt/client/GWTAMChart.java
	src/com/appbootup/explore/gwt/client/chart/pie/PieChartBrokenSlices.java