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/view.js

@@ -74,6 +74,7 @@
 		this.nextBeat = 0
 		this.gogoTime = 0
 		this.drumroll = []
+		this.touchEvents = 0
 		
 		this.beatInterval = this.controller.parsedSongData.beatInfo.beatInterval
 		this.font = strings.font
@@ -1601,6 +1602,7 @@
 						this.touchNote("ka_r")
 					}
 				}
+				this.touchEvents++
 			}
 		}
 	}