User drags in new card
User clicks to select a card
User deletes cards by pressing backspace
Rename x_position and y_position to left and top
Remove ember logging
Drag selected items in sync
Make logo smaller
Select multiple cards by dragging
Handle select box deselection
Don't deselect card on multiple clicks
Modify snap tolerance
Ensure cards are saved after dragging multiple
Stylistic code changes
Create new card with center at cursor
Set isEditing to false when a card becomes unselected
Preserve newlines in card text output
Scroll card text if it overflows
Scroll board if card is off screen
Fixup css
Increase z-index of header