siroky/Payola — Issue #6: cz.payola.common.rdf._ probably should implement "constructors"
Author: teuzz
Created: 2012-02-24 20:43:33+00:00
State: open

Without them the objects are used like

```scala
val e3 = new Edge {
val uri: String = "e3"
val destination: Vertex = v0
val origin: IdentifiedVertex = v11
}
```

But, I know, it is not the common use case scenario of the class.