Retrieve tasks' contexts and categories
Merge branch 'master' of https://github.com/HaLinhh/Chirp
Make TaskId ID attribute. Add test for getTask(int TaskId)
Delete duplicate
Pass the test for getTask by Id
Merge branch 'master' of https://github.com/HaLinhh/Chirp
Merge branch 'master' of https://github.com/cs2103aug2014-w10-4j/main