Updated gitignore
Improvement in operator_size function
Renamed gpc_triples to gpcbasis_triples
Updated the old iciam demo
Renamed stochastic_precond_mean_based to stochastic_preconditioner
Renamed stochastic_precond_mean_based to stochastic_preconditioner
Fixed a problem in the generalised solvers
Renamed generalised_solve_* to tensor_solve_*
Cleanup in tensor methods (+ a bugfix in tensor_scalar_product)
Rename simplefem demo, added operator wrapper for matlab solver
renamed solver_message to tensor_solver_message
improvements in gpc diffusion demo