Feature Major updates and bug fixes

#4 Added logic to disconnect the bot if no song is playing or no one is
listening

#10 Added functionality to play song from local source and ability to
upload songs

#10 No longer cashes songs in memory but queries the database for random
song

#10 Whatsnext will push a song on the queue if it doesn't exist

#10 Next will get a random song from the database

src/main/java/net/locusworks/discord/eighttrack/database/repos/GuildSongRepository.java

@@ -50,4 +50,7 @@ public interface GuildSongRepository extends CrudRepository<GuildSong, Long> {
   @Query("SELECT gs FROM GuildSong gs WHERE gs.guild.guildId = ?1")
   List<GuildSong> findByGuild(Long guildId);
   
+  @Query("SELECT gs FROM GuildSong gs WHERE gs.guild.guildId = ?1 ORDER BY RAND()")
+  List<GuildSong> findRandomSong(Long guildId);
+  
 }