Rollback from using ppdeep to python-ssdeep (libfuzzy)

[psrok1]

Your checklist for this pull request

• I've read the contributing guideline.
• I've tested my changes by building and running the project, and testing changed functionality (if applicable)
• I've added automated tests for my change (if applicable, optional)
• I've updated documentation to reflect my change (if applicable)

What is the current behaviour?

Using ppdeep was really bad idea because Python-based implementation is awfully slow (almost 500x comparing to libfuzzy)

For 40MB file it takes 2 minutes to evaluate a hash:

libfuzzy
24576:Nvk8JqACY/kDtsyDULLk9iFySeLMu/lUHGg:SzACj78LkPR1Kmg 0.24330997467041016
ppdeep
24576:Nvk8JqACY/kDtsyDULLk9iFySeLMu/lUHGg:SzACj78LkPR1Kmg 113.24647259712219

What is the new behaviour?

MWDB uses libfuzzy-dev native dependency like in v2.8.0. It requires native dependency to be installed.

Closing issues

closes #865

[msm-code]

Sad but necessary