Fix serialization of Attributes.

Serializing in wrong order was causing crash on :reload.

Fixes #678.
Merge remote-tracking branch 'refs/remotes/siddhanathan/pull2'
Remove annoying errors from vim :wa.

Vim :wa would always attempt to save the console buffer, resulting in
an error message. Don't attempt to save buffers that don't need to be
saved, and provide a success message after instead of providing
nothing (since viWrite isn't used)
Yi.FuzzyOpen: delete in favour of yi-fuzzy-open
Yi.Templates: delete in favour of yi-snippet
Remove unnecessary calls to withEditor