GetType() function and HasEnemies variable on LevelRooms

Grids are now associated in index - grid data pairs, rather than in a list. This fixes the swapper's functionality with grid entities.

Potential fix for rooms carrying over into the next non-custom floor's starting room.

Extra debugging when entering rooms, to try and catch some strange carried object bugs.

Delay boss splash stopping, D12 now works with bridge failsafe, renamed basement renovator folder.

Attempted fix for invisible grid entities & incorrectly connected rocks.

Fix for adding metadata entity definitions, shared groups function now accepts specifying a group.

New entity metadata system + some helpful editor features.

Set room to uncleared when a pressure plate that must be pressed to clear is included.

Version management and printing.