RestKit/RestKit — pull request #507 by vtourraine (2012-01-16 16:58:51+00:00)
Title: Add refresh_token to RKOAuthClient

When *RKOAuthClient* receives a new *access token*, its delegate should also get the *refresh token*.

I've added:
`- (void)OAuthClient:(RKOAuthClient *)client didAcquireAccessToken:(NSString *)token refreshToken:(NSString *)refreshToken;`