Initial commit of Grave, a graph database backed by Microsoft Extensible Storage Engine and Lucene.NET.
Reintroduced Shutdown, kicked IDisposable on IGraph.
Added a SupportsIdProperty and SupportsLabelProperty to Features.
GetId GetLabel, and other methods à la Java Beans were transformed into properties.
Merge branch 'master' of https://github.com/Loupi/Frontenac.git