Added experimental integration of the Logtalk diagrams.
Removed default values from LogtalkStyles and renamed targetArrow to sourceArrow.
Fixed passing of the project name for the Logtalk Graph view.
Adapted graphml_writer to modified protocol graphp.
Added separators in the ViewBase toolbar.
Improved Logtalk Graph view.
The diagram type and the input type (project, library, rlibrary) can now be selected via drop down menu at the left in the toolbar.
Added handling of library nodes in the graphml writer.
Added more edge types in the grapml writer.
Renamed object graphML_writer to graphml_writer.
Merge branch 'origin/master'
Fixed handling of zero open editors (i.e. no path) in the LogtalkViewCoordinator.
Updated Logtalk diagram names.
Replaced class EdgeRealizerBase with the interface InfoTextProvider. This allows using other edge types (e.g. splines).
Fixed import.
Merge remote-tracking branch 'origin/master' into logtalk_diagram_integration

Conflicts:
	pdt.contextview/pl/pl_to_graphML.pl
	pdt.contextview/src/pdt/y/PDTGraphPredicates.java
	pdt.contextview/src/pdt/y/focusview/ViewBase.java
	pdt.contextview/src/pdt/y/model/GraphDataHolder.java
	pdt.contextview/src/pdt/y/model/GraphModel.java
Use QuadCurveEdgeRealizer for the edges in Logtalk graphs.
Merge remote-tracking branch 'origin/connector_cleanup' into logtalk_diagram_integration

Conflicts:
	pdt.contextview/src/pdt/y/focusview/LogtalkEntityGraphPIFLoader.java
	pdt.contextview/src/pdt/y/focusview/LogtalkGraphPIFLoader.java
	pdt.graphicalviews/pl/lgt/lgt_to_graphml.lgt
	pdt.graphicalviews/plugin.xml
	pdt.graphicalviews/src/org/cs3/pdt/graphicalviews/focusview/LogtalkEntityGraphProcessLoader.java
	pdt.graphicalviews/src/org/cs3/pdt/graphicalviews/focusview/LogtalkEntityView.java
	pdt.graphicalviews/src/org/cs3/pdt/graphicalviews/main/PDTGraphView.java
	pdt.graphicalviews/src/org/cs3/pdt/graphicalviews/model/GraphDataHolder.java
	pdt.graphicalviews/src/org/cs3/pdt/graphicalviews/model/GraphModel.java
	pdt.graphicalviews/src/org/cs3/pdt/graphicalviews/model/realizer/edges/EdgeRealizerBase.java
	pdt.graphicalviews/src/org/cs3/pdt/graphicalviews/view/modes/MouseHandler.java
Merge remote-tracking branch 'origin/logtalk_diagram_integration' into v3.0