Initial class skeleton.
Add Fen alias in ruby files.
Add mp3 class and metadata extraction from filepath.
Merge (squash) branch 'develop'
Install mp3info ruby library.
Allow metadata reading from id3 tags.
Update guessing of metadatas.
Able to generate a tracklist.
Merge (squash) branch 'develop'
Add aliases for generating a tracklist.
Able to know where to generate tracklists.
Split functionality in different engines.
Finalize generate-tracklist.
Rewrite of generate-tracklist using TracklistEngine.
Read tracklist metadata.
Read all metadata from MetadataEngine.tracklist.*
Allow reading of Mp3 common tags.
Add a bit of meta-programming for accessing metadata.
Metaprogramming for every engine.
TracklistEngine now read index and title.