Update #2: Pad types and other small improvements

Update that adds pad types and brings UI improvements: (Also source code is available. Go laugh at my code!: github) Tools:

• Parent class (Tools) created. Now all tools are extend from this class Pad_generator:
• Now have 2 additional types: one speeds up balls, other slows down. UI:
• Small theme improvements
• Some buttons are now toggleable
• Emitter generator now shows current cooldown when editing cooldown