corrected folder names

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

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

...java/com/xeiam/xchart/internal/interfaces/IChartPart.java

.../java/com/xeiam/xchart/internal/interfaces/IHideable.java

...c/main/java/com/xeiam/xchart/internal/markers/Circle.java

.../main/java/com/xeiam/xchart/internal/markers/Diamond.java

...c/main/java/com/xeiam/xchart/internal/markers/Marker.java

...c/main/java/com/xeiam/xchart/internal/markers/Square.java

.../java/com/xeiam/xchart/internal/markers/TriangleDown.java

...in/java/com/xeiam/xchart/internal/markers/TriangleUp.java

...core/src/test/java/com/xeiam/xchart/example/Example0.java

...core/src/test/java/com/xeiam/xchart/example/Example1.java

...ore/src/test/java/com/xeiam/xchart/example/Example10.java

...ore/src/test/java/com/xeiam/xchart/example/Example11.java

...core/src/test/java/com/xeiam/xchart/example/Example2.java

...core/src/test/java/com/xeiam/xchart/example/Example3.java

...core/src/test/java/com/xeiam/xchart/example/Example4.java

...core/src/test/java/com/xeiam/xchart/example/Example5.java

...core/src/test/java/com/xeiam/xchart/example/Example6.java

...core/src/test/java/com/xeiam/xchart/example/Example7.java