Change some events, fix p2 sending gameend twice

- Fixed gameend being sent twice in p2
- Add `ready`, `loader-error`, and `song-select-random` events
- Fixed `session-start` not firing when invited, added event detail
- Fixed `language-change` being fired at startup
- Fixed `version-link` and `about-link` firing twice
- "#song=" will fire `song-select-difficulty`
- Removed `key-events` and `scoresheet-player2`, merged with `scoresheet` and made it more detailed

public/src/js/scoresheet.js

@@ -61,8 +61,15 @@ class Scoresheet{
 			})
 		}
 		pageEvents.send("scoresheet", {
+			selectedSong: controller.selectedSong,
+			autoPlayEnabled: controller.autoPlayEnabled,
+			multiplayer: multiplayer,
+			touchEnabled: touchEnabled,
 			results: this.results,
-			multiplayer: multiplayer
+			p2results: multiplayer ? p2.results : null,
+			keyboardEvents: controller.keyboard.keyboardEvents,
+			gamepadEvents: controller.keyboard.gamepad.gamepadEvents,
+			touchEvents: controller.view.touchEvents
 		})
 	}
 	keyDown(event, code){