Use argparse instead of optparse

[Roman3349]

Signed-off-by: Roman3349 ondracek.roman@centrum.cz

[coveralls]

Coverage remained the same at 38.595% when pulling 07c0ae4 on Roman3349:argparse into ca68c73 on gammu:master.

[coveralls]

Coverage remained the same at 38.595% when pulling 07c0ae4 on Roman3349:argparse into ca68c73 on gammu:master.

[codecov-io]

Codecov Report

Merging #14 into master will not impact coverage.

@@           Coverage Diff           @@
##           master      #14   +/-   ##
=======================================
  Coverage   37.69%   37.69%           
=======================================
  Files          46       46           
  Lines        1666     1666           
  Branches      203      203           
=======================================
  Hits          628      628           
  Misses       1023     1023           
  Partials       15       15

Impacted Files	Coverage Δ
examples/listfilesystem.py	0% <ø> (ø)	✅
examples/filesystem_test.py	0% <ø> (ø)	✅

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[nijel]

Merged, thanks for your contribution!