GraphViewer: Events are now piped though community nodes, contained nodes are now clickable
GraphViewer: CommunityNodes will now check if enough space is available and if there isn't expanded nodes will be colapsed again
GraphViewer: The edges pointing to nodes inside a community are now rendered properly with respect to zoom
GraphViewer: Fixed NodeShaper tests for CommunityNodes that collapse neighbouring communities themselfes
Merge branch 'devel' of github.com:triAGENS/ArangoDB into devel