Fixes#868Fixes#778
Fixes attributes passing wrong key to persistent meta
Fixes blob compatibility with JDBC driver for persistent meta
Fix stackoverflow from countEntities under certain circumstances
Minor cleanup
Mass block changes / chunk packet sending
AsyncWorldEdit (buggy)
Fixed world ground cover layers being generated
Fixed tab completion
Fixed plot title color
Fixed worlds unloading when no players are present
Fixed falling blocks not falling where they should
Fixed console color
Fixed chunk regeneration on full plot worlds
Other stuff
