access_token should be an OAuth2::AccessToken about dropbox_api

[fabiancarlos]

Downgrade the lib, and trying to make it working... but now i have DropboxApi::Errors::HttpError Exception: HTTP 401: {"error_summary": "missing_scope/", "error": {".tag": "missing_scope", "required_scope": "files.content.write"}}

[fabiancarlos]

well... i did make it working, setting the permissions on Dropbox in Dropbox Dev . Opening the App > Permissions, files write and read.

But the current version that is working only passing the token is '0.1.19', others, need to be a valid Oauth2 object... dont know why. Because i wanted to save this to not process everytime.