Removed useless comment.
Merge branch 'master' of https://github.com/cs2103aug2014-w11-2j/main
Added DateTaskComparator for special comparison where deadline tasks come before duration tasks.
Responses returned by commands where more than 1 task is returned will now be sorted by the default sorting in DonTask apart from <today> which will use DateTaskComparator.
Merge branch 'master' of https://github.com/cs2103aug2014-w11-2j/main