Merge branch 'staging' into jin/gui
Add a done button to individual cells, and inverted the color of the buttons
Fixed bug on checkDate and added date error message
Better IOException message.
Actually not really
reverted cell icons to black
Merge branch 'staging' of github.com:cs2103aug2014-w13-1c/main into jin/gui
Added showDoneButton
Merge branch 'jin/gui' of https://github.com/cs2103aug2014-w13-1c/main into jolly/gui
Merge branch 'dat/model' of https://github.com/cs2103aug2014-w13-1c/main into jolly/gui