- Hashing in StdMatrixKey
 - Unnecessary calls to GetRobinBCInfo() in GlobalLinSys
 - Reading expansions in MeshGraph
 - Unnecessary rehashing of matrix keys in Tri/Quad Helmholtz matrix constr.
Added GeometryHash (not yet used)
Added GeomFactorsHash and GeomFactorsSet definitions (not yet used)
Added GeomFactorsSet definitions and hashing function (not yet used).
Added extra error output in session reader
Allow import of FLD datafile for variable coefficients in CardiacEPSolver



git-svn-id: https://gforge.sci.utah.edu/svn/nektar/trunk@3498 305cdda6-5ce1-45b3-a98d-dfc68c8b3305