Imports
- golang.org/x/net/context
- gopkg.in/macaroon-bakery.v2/httpbakery/agent
- gopkg.in/macaroon-bakery.v2/bakery
- gopkg.in/macaroon-bakery.v2/httpbakery
- gopkg.in/macaroon-bakery.v2/bakery/identchecker
- github.com/juju/utils/cache
- gopkg.in/httprequest.v1
- gopkg.in/macaroon-bakery.v2/bakery/checkers
- gopkg.in/errgo.v1