Fixed Graph.AddEdge function to insert unknown vertices in the given edge into the graph. Implementations of AddCostToEdge and Join function lost somewhere in merge long ago
Removed Graph.AddEdgeCost, which was obsoleted. Updated unit test, which now passes
Added try catching
Merge branch 'Release/Alpha/FullVersion' of https://github.com/jannickj/nabf into Agent/AI/Advanced

Conflicts:
	TeamNabf/AgentLogicTest/Test.fs
updated some logging error and located bugs in ai code
Merge branch 'Agent/AI/Advanced' of https://github.com/jannickj/nabf into Agent/AI/Advanced