Updates to make StdRegions and LocalRegions more dimension independent. To do this I have only tried to keep Trace methods in StdExpansions.h and moved orientation related methods to Expansion where possible. Note that some orientation methods are required in SpatialDomains so not call could be moved. I also believe I have been able to remove some unused methods. However there was some methods in 3D that required access to Edges which I have now placed only in StedExpansion3D and used the .as<Expansion3D>() cast when they are called tpyically in Preconditioners such as Block and LowEnergyBlock. Finally I have tended to use GetGeom()->GetNUmEdges if edge numbers are required for a 3D method.