Browse endpoint

[arnaugarcia]

• [x] GET /api/genres/{genres_id}/tracks | Get tracks by genre
• [x] GET /api/playlists/recent | Get a List of recent playlists
• [x] GET /api/playlists/popular | Get a List of most followed Playlists
• [x] GET /api/tracks/recent | Get a List of recent tracks
• [x] GET /api/users/recent | Get a List of recent artists
• [x] GET /api/users/{login}/following | Return if user is followed by the current user
• [x] GET /api/tracks/{id}/liked | Return if track is liked
• [x] GET /api/playlists/{id}/followed | Return if playlists is followed