v2.0

Version 2.0 comes with a whole new feature: the online scoreboard! Challenge your friends and climb the high score ladder to the top.
It's a work in progress made by @Th3vanger whom I thank a lot!
Other updates:

• you can now pick a "remaing balls left" message instead of the default "ball number" message
• whenever a new version is available, the app will now prompt you to download it
• the plunger popup can now be disabled
• minor improvements