roughed in vector export

.gitignore

pom.xml

.../java/com/xeiam/xchart/standalone/VectorGraphicsTest.java

xchart/pom.xml

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

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

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

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

...main/java/com/xeiam/xchart/internal/chartpart/Legend.java

.../xeiam/xchart/internal/chartpart/PlotContentBarChart.java