Initial class skeleton.
Add Fen alias in ruby files.
Add mp3 class and metadata extraction from filepath.
Add Gread, Gremove, Gmove and Gblame shortcuts.
Update formatoptions
Merge (squash) branch 'develop'
Install mp3info ruby library.
Allow metadata reading from id3 tags.
Update guessing of metadatas.
Able to generate a tracklist.
Add alias to switch to develop or master from no-longer existing dir.
Better update of Git prompt when using aliases.
Merge (squash) branch 'develop'
Better prompt update when issuing complex git commands.
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.