Added new lines to initialise new lists for TotalTaskList
Added an accessor method to return the status of whether a task was completed or not.
Added COMPLETED in Search's list of subcommands
Added new subcommand: Completed
Added new lists of tasks for overdue tasks and completed tasks. The current list now holds tasks which are not overdue and not yet completed.
Added lines and new methods to read check for the task's status (i.e. completed, overdue or currently work-in-progress) before adding them into the relevant list, from the text file.
Working on the CommandInterpreter for Search and Completed.
Merge branch 'master' of https://github.com/cs2103aug2014-t7-2/main

# By Natalie Rawle (3) and others
# Via Natalie Rawle
* 'master' of https://github.com/cs2103aug2014-t7-2/main:
  Removed relocated code and added tags to my own code.
  Fixed major bug in ExceptionHandler's integration.
  Refactored the GUI and finished integrating the exception handler.
  temp. still updating add + probably task factory to support Time. will finish it up when i get back at 12mn-ish
  Implemented a working Time class.
  Avoided Nulls

Conflicts:
	dataEncapsulation/ezC.java
	dataManipulation/Command.java
	dataManipulation/Subcommand.java