legacy: xmlmarclint import fix
legacy: xmlmarclint import fix

* Moves import of sys module into main() function for things
  to magically work.

* Removes legacy "version" parameter.

* General PEP8/PEP257 fixes.

Signed-off-by: Jan Aage Lavik <8d55e006a1b29770f275a5c59a7341f17f8e69d5@cern.ch>

inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio,tiborsimko/invenio