code format

...va/com/xeiam/xchart/demo/charts/area/AreaLineChart03.java

...main/java/com/xeiam/xchart/standalone/TestForIssue83.java

xchart/src/main/java/com/xeiam/xchart/BitmapEncoder.java

xchart/src/main/java/com/xeiam/xchart/CSVExporter.java

xchart/src/main/java/com/xeiam/xchart/CSVImporter.java

xchart/src/main/java/com/xeiam/xchart/Histogram.java

xchart/src/main/java/com/xeiam/xchart/XChartPanel.java

...c/main/java/com/xeiam/xchart/internal/chartpart/Axis.java

...a/com/xeiam/xchart/internal/chartpart/AxisTickLabels.java

...c/main/java/com/xeiam/xchart/internal/chartpart/Plot.java

xchart/src/test/java/com/xeiam/xchart/HistogramTest.java