Implement a command status class
-will return the process of the command is success, invalid or error
Implement new Add Class & Change the category parser and command parser
Implement new Add Class
-Ignore previous add class commit
Implement a class to process execute and undo function
Implement a  new delete class
Implement a String Util class to aid in the processing of a string
Edit the CommandParser to use the new function classes
Implement a new edit class
Remove unwanted file
Updated controller to use new Command classes

Access modifier of methods in CommandParser is changed to public as
Controller needs to know what type of command the user typed to decide
what output to show.
Cleaned up CommandParser and HelloController.
Updated CommandParserTest to use new processCommand.
Added LICENSE to all files. Renamed files.
Fixes bug where fxml is not linked to new Controller filename.
Implement new complete function
Edited complete function and implement test case for complete function
Added new logic controller to handle 2 a display and actual storage.
- Replaced all test cases with new Logic implementation.
- Added ToDoRead command. (Can be expanded to ToDo searching etc)
- Updated MainToDoController to display task via ToDoRead and new display storage.
Merge pull request #48 from cs2103aug2014-t17-3j/new_CommandParser

New command parser