Update guessit library to version 2

[hugbug]

VideoSort uses library "guessit" to extract information from file names. There are several issues in VideoSort which are actually issues in guessit. We should check if the latest guessit version works better and if it doesn't we should report the issues to guessit author.

The version of guessit used in VideoSort is two years old.

This issue is about updating guessit to current version.

Looking at guessit site I see that in the meantime it was completely rewritten from scratch, it lives in a different github repository, and the author is a different developer, the API was redesigned (incompatible). So basically an all new library from a different developer although probably approved by the original author.

Meaning the update might be not so easy to do.