Revert syncDirtyAndDestroyed ignoring local/remote options from #65

This was ineffective for its purpose and caused local/remote to be
ignored at uninteded times, as in #62, #70.

Revert 25b890f8eb7807ed93052d0044f76150ae64f794 "syncDirty disregards local/remote options too".
Revert 48fb69555d2207d64d4f68d765d6602d294b3af1 "syncDirtyAndDestroyed is not affected by local/remote options"

Conflicts:
	backbone.dualstorage.amd.js
	backbone.dualstorage.coffee
	backbone.dualstorage.js
	spec/backbone.dualstorage.js