Fixed bugs, delay rewrite & repeaters
- Redstone could not be placed on hoppers and redstone blocks
- Torches could not be placed on redstone blocks
- Fixed redstone not injecting correctly when going backwards on slabs
- Better redstone torch timing (may not be completely correct, but now easier to modify)
- Added setBlockPowerDelay and removeBlockPowerDelay methods in RSManager
- Added getBlockPower method to BlockType (called by getBlockPower in GlowBlock) to provide correct power values
- Added repeaters (delay handling + disabling from the side)