Enhance chemical explosion system.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Add more explosion rules.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Add more explosion rules.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Resolve conflicts

Conflicts:
	src/main/java/minechem/Minechem.java
Merge branch 'yushijinhun-feature-explode' into 1.7-update