BugFix: NullPointers in FlickrOAuthSession and FlickrOAuthServiceBuilder
BugFix: delete remaining Vimeo file
BugFix: YouTubeOAuthSessionTest: apply fix from FlickrOAuthSessionTest
Add Provider name to access token generation message
BugFix: NullPointer: use "early definition" in *ServiceBuilder
Add YouTube access Token file template (and ignore the actual file)