Previous oauth2 (code.google.com/p/goauth2/oauth) still used in:
third_party/github.com/tgulacsi/picago
pkg/importer/picasa
pkg/importer/foursquare
Final cleanup in a subsequent CL.
Change-Id: I805d81fcaa651e03a17823c78abe5040d51346c3
To avoid user confusion, force camtool googinit use to actually
specify if Google Cloud Storage or Google Drive auth setup is
desired.
Change-Id: I6541b4a589de2dda73b725fcaf7bcdadd3f60b65