Scrolling works for keyboard input and not buttons now.
Merge branch 'staging' into dat/scrolling
Appropriate titles are now passed to title bar

main window title remains at "wat do"
showing overdue tasks no longer includes done tasks
Centered the title label
Merge pull request #242 from cs2103aug2014-w13-1c/jin/gui

Centered the title label
fixed bring focus onto inputfield on app launch
Fix default file directory from '.' to './'
Merge pull request #243 from cs2103aug2014-w13-1c/jin/gui

Fix default file directory from '.' to './'
Merge pull request #245 from cs2103aug2014-w13-1c/staging

Merge for v0.4 tutorial