Working on adapting Data Laboratory to new GraphStore

Still TODO:
   Mainly Dynamics
   Listen to Graph events so tables can be updated
   Test Data Laboratory features
Merge branch 'master' of github.com:gephi/gephi into datalab
Merge branch 'master' of github.com:gephi/gephi into datalab

Remove fake id columns from data laboratory since now they are real columns.
Minor details for data laboratory
Merge branch 'master' into datalab
Merge branch 'master' of github.com:gephi/gephi into datalab
Add observers to graph and tables for auto-refreshing tables.
Fix occasional bug when changing workspace in data laboratory (wrong graphstore columns were used).
Re factor some code.
Merge remote-tracking branch 'upstream/datalab' into 0.9-migration-3

Conflicts:
	modules/DataLaboratoryAPI/src/main/java/org/gephi/datalab/impl/AttributeColumnsMergeStrategiesControllerImpl.java
	modules/DataLaboratoryPlugin/pom.xml
	modules/DataLaboratoryPlugin/src/main/java/org/gephi/datalab/plugin/manipulators/columns/ui/ConvertColumnToDynamicUI.java
	modules/DesktopDataLaboratory/src/main/java/org/gephi/desktop/datalab/AvailableColumnsModel.java
	modules/DesktopDataLaboratory/src/main/java/org/gephi/desktop/datalab/DataTableTopComponent.java
	modules/DesktopDataLaboratory/src/main/java/org/gephi/desktop/datalab/DataTablesModel.java
	modules/DesktopDataLaboratory/src/main/java/org/gephi/desktop/datalab/EdgeDataTable.java
	modules/DesktopDataLaboratory/src/main/java/org/gephi/desktop/datalab/NodeDataTable.java
	modules/GraphAPI/pom.xml
	modules/application/pom.xml
Reactivated node dragging and rectangle selection
Avoid (caught) NPE in getIcon when category is null
Removed dependencies to data-attributes-api
Re-enabled selection handling for tools and filters
Allowing dynamic edge weight in overview rendering ForceAtlas2 layout
Migrating timeline and dynamic to new graphstore, still in progress

Conflicts:
	modules/DesktopStatistics/src/main/java/org/gephi/desktop/statistics/DynamicSettingsPanel.java
Generate dynamic graph with dynamic weights
Enabling dynamic, timeline and spigot plugins. Minor fixes.