Card view finished.

http://javapapers.com/android/android-cards-list-view/
Little adjustment, the style of drawer and card list can all be
modified. Change GUI later, now focus on:

1. delete, archive a note
2. empty the trash notes
3. move a note from archive back
4. move a note from trash back

TODO later:

1. display a note and modify it
2. cannot save blank note
3. save notes to cloud