Allow style properties override from pom.

[hgschmie]

This adds a new property section to the configuration, which allows
overriding any property that is listed in the dot.properties file. This
is especially useful if graphs need to match some corporate guidelines.

e.g. using

           <styleProperties>
              <property>
                <name>scope.runtime.color</name>
                <value>black</value>
              </property>
              <property>
                <name>scope.runtime.fontcolor</name>
                <value>black</value>
              </property>
            </styleProperties>

to change the color of "runtime" edges.

[buildhive]

Jeff Caddel » graph-maven-plugin #4 SUCCESS
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