save and load functions modified so the new field : timeUsed can be saved and loaded correctly
Renamed IDonCommand to AbstractDonCommand and changed it from an interface to an abstract class.
DonCommand is currently unused.
This commit cannot be run.
Making changes to DonParser. Unfinished, unrunnable.
Changed setAddCommand to use the new DonCreateCommand.
Added DonEditCommand for editing commands.
Made setEditCommand work with the new DonEditCommand.
Added getTaskByName to DonStorage.
Added setTaskList to DonResponse.
Merge branch 'command' of https://github.com/cs2103aug2014-w11-2j/main into command