Merge pull request #18 from mershack/master

update
#8

1. in pollprops is defined outside
2. GraphD3Viewer have only the property color now.
#8

GraphD3Viewer shows nodes of given property color.
#8

Perspectives GraphD3Viewer changed
#8

org.json.jar added to perspectives instead of actual java files
.
Merge remote-tracking branch 'upstream/master'
.