Fix issue with filenames which include a dot

[diegorad]

The filename of tracks which include a dot in its name are cut after the dot:

Downloading the track Song (feat. Other artist) results in the file Artist - Song (feat.flac.

When downloading albums containing different versions of the songs (E.g. Song (feat. Other artist) and Song (feat. Other artist) - Remastered) this issue generates conflicting filenames, resulting in only one of the files being stored.