create prioritzeTask function
create postponeTask function
create massDelete function
create recurringTask function
create addingTags function
Merge branch 'master' into lareina-storage

Conflicts:
	.idea/misc.xml
	.idea/workspace.xml
	cs2103aug2014-W09-3j.iml
	src/tareas/common/Tasks.java
	src/tareas/storage/StorageWriter.java
	src/tareas/storage/TareasIO.java
update changes
remove bugs in massDelete and postponeTask
testing insertTask
added multiple input case in testEditTask
Merge branch 'master' into junhao-taskmanager-unittesting

Conflicts:
	src/tareas/storage/StorageJUnitTest.java
Added time stamps to tareascontroller logging
Removed todo for controller for on default to throw exception, controller should be handling exceptions thrown by parser or storage
Added description to feedback for users to be sure of what they have just done instead of just success or failure messages
command delimter change to / to suit Jim
Removed storage.json for future testing and removed unused method getSize in taskamanger
Refactored postpone task in tereasIO to one line
Added todo to allow editing of other stuff
Put more spaces in between method callings in controller to keep it readable
Pass latestTasksIsNotEmptyAfterSet test for taskmanager