Merge pull request #55 from srvbots/master

https://github.com/kbengine/kbengine/issues/53
Merge pull request #56 from srvbots/master

i'm sorry.
Merge pull request #57 from srvbots/master

called destroySpace, crash. (#52)
Merge pull request #59 from srvbots/master

机器人可能会crash
Merge pull request #60 from srvbots/master

added GhostManager.
up
Merge pull request #1 from kbengine/master

ok