Refactored Sidebar's undo and redo event handlers
Merge branch 'staging' of github.com:cs2103aug2014-w13-1c/main into jin/gui
Fixed bug on update & changed priority algorithm
All errors from model properly dealt with.
Merge branch 'staging' of https://github.com/cs2103aug2014-w13-1c/main into staging
Changed date and priority parsing algorithm

only the last "start", "end" and "priority" keywords will be checked
Change saturation of task list cell backgrounds based on the number of days to the end date as well.
Merge pull request #234 from cs2103aug2014-w13-1c/jin/gui

Jin/gui
Added parsing for sorting method
Refactored button event handling code in TaskListCell to mirror Sidebar's implementation.
Merge pull request #235 from cs2103aug2014-w13-1c/jin/gui

Refactored button event handling code in TaskListCell to mirror Sidebar's implementation
Preparing for searching with date
Replace titlebar sort style choice box event listener with a lambda
Merge branch 'staging' of github.com:cs2103aug2014-w13-1c/main into jin/gui
Merge branch 'staging' into ryan/controller

Conflicts:
	src/app/controllers/CommandParser.java
	src/app/helpers/CommandObject.java
Fixed sortStyleChoiceBox functionality
Merge pull request #236 from cs2103aug2014-w13-1c/jin/gui

Finish sorting style choice box
Merge pull request #237 from cs2103aug2014-w13-1c/ryan/controller

Changed parsing algorithm, added parsing for sort, preparing keywords for search by dates
Improved the magic words for error messages
Scrolling works for keyboard input and not buttons now.