This package used to be a useful way to navigate and select through blocks.
But now, Atom has implemented this functionality into it's core. Simply add this to your keymap.cson file:
'.editor':
'alt-up': 'editor:move-to-beginning-of-previous-paragraph'
'alt-down': 'editor:move-to-beginning-of-next-paragraph'
'alt-shift-up': 'editor:select-to-beginning-of-previous-paragraph'
'alt-shift-down': 'editor:select-to-beginning-of-next-paragraph'