Refactor Controller to support UNDO
added Floating Task Row css
Merge branch 'master' of https://github.com/cs2103aug2014-w14-1j/main into daryl-ui
Merge branch 'master' of https://github.com/cs2103aug2014-w14-1j/main into controller
fixed UI Bug on displaying after Edit
UI display width and text areas.
Merge branch 'master' of https://github.com/cs2103aug2014-w14-1j/main into controller
Create 2 new Controller
Support Undo
isOverdue() autopasses date check, controller search