move method updated

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Merge pull request #6 from jediweon/master

move method updated
setOpen function rename to setGateStatus
Update Elevator.java

typo fixed...
Merge pull request #9 from jediweon/master

Update Elevator.java
Merge pull request #7 from SkywaveTM/master

leave method
Merge pull request #8 from jereneal20/master

setOpen function rename to setGateStatus