Fixes

Currently I play survival with my friends on a MCServer server.
We already found many bugs.

- Survival mode player are not allowed to break bedrock (Client hacks?)
- Disabled mobspawner itemdrop
- Spawn exp if you break a mob spawner
- Fixed block place sounds
- Added hoe interact sound
- Only place farmland if no block is upper the dirt/grass block.
- Farmland go instantly to dirt if you place a solid block over it.
- Farmland go instantly to meta 7 if water is in near.