dropbox 2.5.0

Updated spec

on Node.js NPM

Auth namespace:
- Added TokenFromOAuth1Arg, TokenFromOAuth1Result and TokenFromOAuth1Error.
- Added token/from_oauth1 rote.
- Added AccessError and PaperAccessError.
- Added InvalidAccountTypeError.

Files namespace:
- Added UploadSessionFinishBatchLaunch and made it new return type for upload_session/finish_batch.
- Added DeleteBatchLaunch and made it new return type for delete_batch.
- Added RelocationBatchLaunch and made it new return type for copy_batch and move_batch.

Sharing namespace:
- Added unsupported_link_type to SharedLinkError.
- Added is_member to GroupInfo.
- Added too_many_files to UnshareFolderError.
- Added no_explicit_access to RelinquishFolderMembershipError.

Stone Cfg namespace:
- Added feature route attribute.

Team namespace:
- Added group_name_already_used and group_name_invalid to GroupUpdateError.