Item Detector v1.0.0

Initial portfolio release.

Features
- Adds the Item Detector block.
- Detects items in adjacent containers.
- Supports multiple item rules.
- Duplicate item rules add together for counts above 64.
- Checks automatically every 30 ticks.
- Provides redstone output by placing a redstone block above the detector while matched.
- Includes custom active and inactive textures.

Suggested screenshots
- Item Detector beside a chest.
- Rule editor screen.
- Chest contents matching the rules.
- Redstone output active above the detector.
