• (Fix) '(', ')', '/' and '?' are now safe characters in url encoded strings.
• (Enhancement) Added support for specifying if refresh tokens should be created on authorization code grants.
• (Fix) OAuth2Token now handles None scopes correctly.
• (Fix) Request token is now available for OAuth 1.
• (Enhancement) OAuth2Token is declared with __slots__ for smaller memory footprint.
• (Enhancement) RefreshTokenGrant now allows to set issue_new_refresh_tokens.
• Documentation improvements and fixes.