Lots of tweaks to the osu! embeds (#4)

* Simplify beatmap embed information

* Shrink embeds!!

* Put ranked status on information

* Paint the user embed!

* Add gained pp

* Use more carefully crafted hooks

* 'JSformat' the bpm float

youmubot-osu/src/discord/mod.rs

@@ -122,11 +122,6 @@ pub fn mania(ctx: &mut Context, msg: &Message, args: Args) -> CommandResult {
 pub(crate) struct BeatmapWithMode(pub Beatmap, pub Mode);
 
 impl BeatmapWithMode {
-    /// Whether this beatmap-with-mode is a converted beatmap.
-    fn is_converted(&self) -> bool {
-        self.0.mode != self.1
-    }
-
     fn mode(&self) -> Mode {
         self.1
     }