Migrate to Plugged

[ylt]

https://github.com/SooYou/plugged

Much more plug features supported, looks less prone to errors.

Has much less helper methods:

• doesn't keep track of active users
• play history
• etc

In order to do these actions have to do an expensive HTTP request.

Having these features not implemented is beneficial as it allows us to implement them ourselves in a way much more consistent and useful for Wallace's model.

[ylt]

Implementing this will change how plug is implemented. New classes will be implemented to allow more seamless interaction. This will affect event handling in the rest of the bot a bit.

Not fully planned out yet, but will be along the lines of:

/* mostly to match up with Slack, equivalent to channel */
class PlugChat {
    public PlugMessage[] messages;
    public PlugUser[] members;
    public object[] tokenizeMessage(String message); /* get tokens for the service */
    public sendChat(String message, boolean emote);
}

class PlugMessage {
    public PlugUser user;
    public String message;
    public String command;
    public object[] tokenize(); /* shorthand for above */
    public void reply(String message, boolean emote);
    public void delete();
}

class PlugUser {
    public int userId;
    public String username;
    public PlugRole role; /* wrap rank and allow conversion with */
    public void sendChat(String message, boolean emote);
    public void sendReply(String message, boolean emote);
    public void kick(String reason, callback);
    public void ban(String reason, int duration, callback);
    public void setRole(Role role);
    public void mute(time, reason, callback);
    public void skip(callback); //not 100% sure
    public void addToWaitlist(callback);
    public void removeWaitlist(callback);
    public void moveDJ(position, callback);
    public void removeMessages();
    public boolean isFriend();
    public boolean isCurrentDJ();
    public int getWaitlistPosition();
    public boolean isInWaitlist();
}

Other functionality will be wrapped also, such as the playlists and the overall media support.