Level optimizations
Reverted DIAMOND_HOE to IRON_HOE
Fix 64 bit builds
Fix compiler again
Added .idea to .gitignore
Merge branch 'master' of https://github.com/shoghicp/PocketMine-MP
Merge branch 'master' of https://github.com/shoghicp/PocketMine-MP

Conflicts:
	src/world/Explosion.php
	src/world/Level.php