Merge pull request #79 from mehere/dev-wee

Inserted getLeaveId()
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Merge branch 'dev' of https://github.com/mehere/RTSS.git into dev
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Merge pull request #80 from mehere/dev-wee

Scheduling Algo to increase recommendedNoOfLesson if failed.
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Merge dev_xue into dev
Merge pull request #81 from mehere/dev

Pull Request from dev -> dev-wee on 3/3