cs2103aug2014-w10-1c/main — pull request #187 by digawp (2014-10-12 13:29:09+00:00)
Title: Transaction commit fix

#186
- Add test for nested transaction
- Commit supports nested transaction, but may only commit transaction on top of the transaction stack
- Saves data to disk after every successful commit (commit that is not just merging transactions)
- Modify test cases to make use of the singleton
- No extra test cases for #171 yet