Fixed InvalidOperationException for empty graphs in SimpleTreeLayoutAlgorithm.GenerateSpanningTree(). Reported as issue #8290 on Codeplex.
Improved vertex dragging. Fixes #4.
Fixed ArgumentOutOfRange in FSA overlap removal. Fixes Codeplex issue 8274.
Merge branch 'master' of https://github.com/andypelzer/GraphSharp.git