Added dictionary functionality to Rule(6) class

[jllorente]

This commit adds the dictionary functionality to Rule() and Rule6() classes.
This addresses a previous feature request reported in issue #219

[ldx]

Did you try running tests locally? They failed on Travis:

test_hashlimit (tests.test_matches.TestHashlimitMatch) ... 
travis_time:end:054ea712:start=1510535572443631907,finish=1510535573155267335,duration=711635428
�[0K
�[31;1mThe command "sudo PATH=$PATH coverage run setup.py test" exited with 139.�[0m

Done. Your build exited with 1.

[jllorente]

I ran the test on my system for both python2 (2.7.12) and python3 (3.5.2). They ran ok, all of them :)

~/python-iptables/tests# $PYTHON ./test_iptc.py
~/python-iptables/tests# $PYTHON ./test_matches.py
~/python-iptables/tests# $PYTHON ./test_targets.py

[ldx]

Sorry for the delay on my part, I'd like to look into the failures in the Travis CI build. They look like segfaults when running the test suite.

[coveralls]

Coverage increased (+0.2%) to 59.5% when pulling edabe7c on jllorente:master into 583f939 on ldx:master.

[jllorente]

It seems the build issues have been resolved and now there are no conflicts. I have also improved the dictionary generation function to remove empty lists and fields.

[ldx]

Nice! Can you also add tests for the dict methods, and a few lines to doc/examples.rst? Thanks!

[jllorente]

I completely forgot about this PR, sorry about that!
Can we merge as is ?

[ldx]

Nice 👍