Remove unused code from Main
Add RPC_SERVER to GlobalValues and UbigraphClient
Add methods to remove atoms in VisualizationSpace
Add remove functions to AtomSpace
Add getters and setters for edgeSpace and vertexSpace
Improve RandomGraph example with creation and deletion of atoms
Add setEdgeAttribute to UbigraphClient
Consider edgeLabel in createEdge through the new UbiGraphClient method
Add THREE and HALF to GlobalValues
Increase number of visualization params
Solve bugs in VisualizationSpace