Simplenote

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* Handle BadStatusLine errors

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* Fix issue where update_note was actually modifying the external note object passed to it rather than creating a copy and returning that.

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* Fix error in version number

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* Handle invalid/expired tokens
* Fixed KeyError in get_note_list() when offline
* Fix order of note, status for trash_note

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* Adds since paramter back in (as Simperium cursor, not date)

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* No end facing change in functionality - just removes a superfluous default modificationDate