Fixed package name.

chart_inheritance/pom.xml

.../main/java/edu/unl/cse/soft161/chart_inheritance/App.java

...edu/unl/cse/soft161/chart_inheritance/CartesianPoint.java

...va/edu/unl/cse/soft161/chart_inheritance/ChartCanvas.java

...a/edu/unl/cse/soft161/chart_inheritance/PackageADemo.java

...a/edu/unl/cse/soft161/chart_inheritance/PackageBDemo.java

...a/edu/unl/cse/soft161/chart_inheritance/PackageCDemo.java

...ava/edu/unl/cse/soft161/chart_inheritance/PolarPoint.java

...ava/edu/unl/cse/soft161/chart_inheritance/a/BarChart.java

...va/edu/unl/cse/soft161/chart_inheritance/a/LineChart.java

...ava/edu/unl/cse/soft161/chart_inheritance/b/BarChart.java

...du/unl/cse/soft161/chart_inheritance/b/CategoryChart.java

...a/edu/unl/cse/soft161/chart_inheritance/c/RadarChart.java

...edu/unl/cse/soft161/chart_inheritance/c/ScatterChart.java