remove comments in EzAction.
modify EzTask
Add Invalid in TypeOfAction
add parameter storage in parser method
partially done parser.
Merge remote-tracking branch 'origin/HEAD'
add private for listOfTasks and numTasks attribute of EzStorage
add format of ADD command
add JUnit Test for EzParser
update JUnit Test for EzStorage
Added checkPos method to check the position of pointer before performing each function.
Merge branch 'master' of https://github.com/cs2103aug2014-t09-3j/main
Modified the code for checkPos method.
change color of the right arrow
update Button Panel of EzGUI
add keyword-highlighting feature
Added updateTask and deleteTask methods, edited addTask and addTaskWithNewId methods