Removed unused Input class.  Tidied up docstrings, renames vars
Removed unused Input class.  Tidied up docstrings, renames vars

willu47/smif,nismod/smif,willu47/smif,tomalrussell/smif,nismod/smif,willu47/smif,tomalrussell/smif,willu47/smif,nismod/smif,tomalrussell/smif,tomalrussell/smif,nismod/smif