more bar chart work

...n/java/com/xeiam/xchart/demo/charts/area/AreaChart01.java

...ain/java/com/xeiam/xchart/demo/charts/bar/BarChart02.java

...ain/java/com/xeiam/xchart/demo/charts/bar/BarChart03.java

...ain/java/com/xeiam/xchart/demo/charts/bar/BarChart04.java

...ain/java/com/xeiam/xchart/demo/charts/bar/BarChart05.java

...n/java/com/xeiam/xchart/demo/charts/date/DateChart01.java

...n/java/com/xeiam/xchart/demo/charts/date/DateChart02.java

...n/java/com/xeiam/xchart/demo/charts/date/DateChart03.java

...n/java/com/xeiam/xchart/demo/charts/date/DateChart04.java

...n/java/com/xeiam/xchart/demo/charts/date/DateChart05.java

...n/java/com/xeiam/xchart/demo/charts/date/DateChart06.java

...n/java/com/xeiam/xchart/demo/charts/date/DateChart07.java

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

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

...n/java/com/xeiam/xchart/internal/chartpart/AxisTitle.java

.../java/com/xeiam/xchart/internal/chartpart/ChartTitle.java

...rnal/chartpart/axistickcalculator/AxisTickCalculator.java

...rtpart/axistickcalculator/BarChartAxisTickCalculator.java

.../chartpart/axistickcalculator/DateAxisTickCalculator.java

.../internal/chartpart/axistickcalculator/DateFormatter.java