Added generation of tangential basis into GeomFactors
Updated ADR2DManifold solver to use GeomFactors for tangents
Added <GEOMINFO> XML session section support in MeshGraph
Fixed const-correctness in VmathArray
Cleaned up LocalRegions code to generate GeomFactors
Removed GenSegExp
Temporary fix to SubStructuredGraph
Documentation for GlobalLinSys and GlobalMatrix classes


git-svn-id: https://gforge.sci.utah.edu/svn/nektar/trunk@2125 305cdda6-5ce1-45b3-a98d-dfc68c8b3305