Add: dev trello board
Add: boards.
Fix: loader return JSONObject list.
Add: cards in pager.
Refactoring.

Add: cache.
Add: custom cards layout.
Add: add card dialog.
Add: add card in the list.
Fix: restart loader after add a card, clear adapter when load finished.
Add: refresh button.
Fix: start activity no history.
Add: soft keyboard pop up when add card.
Fix: layout list header.