Added todict() method to Command

[Seemone]

Adds a method to represent the sieve filters as dicts

usage example:

    jlist=[]
    if p.parse(filters):
        for r in p.result:
            jlist.append(r.todict())
        print(json.dumps(jlist),file=outfile)

[tonioo]

Please make your PR compatible with PEP8.

[tonioo]

Could you respect PEP8 please?

[tonioo]

Same here.

[tonioo]

Can you remove this comment?

[codecov]

Codecov Report

Merging #67 into master will decrease coverage by 2.12%.
The diff coverage is 15.09%.

@@            Coverage Diff             @@
##           master      #67      +/-   ##
==========================================
- Coverage   84.07%   81.94%   -2.13%     
==========================================
  Files          10       10              
  Lines        1683     1734      +51     
==========================================
+ Hits         1415     1421       +6     
- Misses        268      313      +45

Impacted Files	Coverage Δ
sievelib/parser.py	86.41% <100%> (ø)	⬆️
sievelib/commands.py	85.87% <13.46%> (-9.75%)	⬇️

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[Seemone]

Modified and checked against http://pep8online.com/
The only outstanding issue is a line too long in the original scope (out of scope of this PR) that it's too long because of an inline comment.

[tonioo]

Can you add some unit tests please?

BTW, I think you should be interested by this method: https://github.com/tonioo/sievelib/blob/master/sievelib/commands.py#L269.

[Seemone]

I have no idea how to do it, sorry.

[Seemone]

But it would be a good idea, since I already discovered a bug :)

[Seemone]

I'm going to add an attribute name mapping layer that will change the keys of the arguments