move test_exclusiveness test_allowed test_files to argparser

Signed-off-by: Mattias Andrée <maandree@operamail.com>
missed one line

Signed-off-by: Mattias Andrée <maandree@operamail.com>
simplify test_files

Signed-off-by: Mattias Andrée <maandree@operamail.com>
fix test of how many files there should be, -X and -R had each other's limits

Signed-off-by: Mattias Andrée <maandree@operamail.com>
test_files verbose

Signed-off-by: Mattias Andrée <maandree@operamail.com>