Improve WowNetworkVenus

[WillyOrtrun]

• added filename schema parsing for files downloaded via the normal download buttons (still works with filenames, that do not fit the schema)
• results sorted by similarity taking performers into account if they could be determined from the filename, instead of the useless default sorting of the scraped search results
• fix no result issue, if there is a number in the scene name (removes numbers from search scraping request)
• added sceneByFragment/Scene Identify capabilities

It is unlikely, that I will find the time to implement changes the maintaners may want, It works for my usecases so basically I am leaving this here for anyone that wants to use it, or for anybody that has the time to upstream it. I may miss notifications, as this is obvsiously a throwaway account.

Potential Improvements (listing this here in case somebody else takes over):

• Bring into naming conventions (artists -> performers)
• Change param[1] naming, currently in line with torrent.py, but quite confusing
• Get rid of interleave_results(), the sorting makes this unnecessary, but still calling the function
• Check if the new sys.argv[1] logic covers all usecases of the previous if NAME / if URL logic
• remove debug log messages (?)