added repeating interval attribute to Task class and UserInput class
repeating interval added by parser
Modified StorageTest
Merge branch 'master' of https://github.com/cs2103aug2014-w15-3J/Ticker
Modified UndoManagerTest
use timeline to display the current time
current time display fully implemented
Merge branch 'UI'
some minor bugs fixed
Merge branch 'UI'
Merge remote-tracking branch 'origin/Logic'

Conflicts:
	src/ticker/logic/UndoManagerTest.java
Edited UndoManagerTest
Merge pull request #96 from cs2103aug2014-w15-3J/master

Merge Logic with Master