Documentation/port more namelist documentation from sourceforge

• Add documentation for driver and stir namelists

• Add documentation for eigval_knobs namelist

• Add documentation for fields_knobs namelist

• Adds documentation for the hyper_knobs namelist

• Add documentation for nonlinear_terms namelist

• Add documentation for ingen namelist

• Add documentation for init_knobs namelist

• Add documentation for le_grids namelist

• Add documentation for normalisations namelist

• Add documentation for reinit_knobs namelist

• Adding documentation for source_knobs namelist

• Add species_knobs namelist documentation

• Add species_parameters namelist

Still a few namelists left to document