Webplayer can now handle a basic playlist, pushing multiple songs in the
playlist and passing from one song to another.
Some things that are not yet working:
* Using previous and next buttons and going outside of the playlist
breaks things.
* Random / repeat modes are not yet implemented.
* Playlist is not exposed in the UI at the moment.
* Seeking in a song is not exposed in the UI.
* When playing a song, webplayer does not automatically play the next
one when reaching the end of the song.
Major code review, cleaning the code and adding a lot of comments. Also
implements a separate store to keep entities with a reference count and
garbage collection. This closes#15.
Known issues at the moment are:
* Webplayer is no longer working, it has to be refactored.
* AlbumPage is to be implemented.
Now able to play a single file, in a format supported by your browser.
* Playlists not yet supported.
* Volume is a simple on/off switch.
* Repeat / Random not yet supported.
Invalidate the store at logout, emptying cached items such as artists,
albums and songs and then preventing them from quickly reappearing when
reconnecting with the same or a different account.
Closes#5.
* Keep track of pagination in the store
* Use Immutable in reducers
* Finish i18n, every available strings are now translated in English and French
* Add a loading indicator
* Premises of API error handling
* Better locale negotiation
