Add more plugin API that I'd forgotten about.
Add more plugin API that I'd forgotten about.

simonwagner/grantlee,cutelyst/grantlee,cutelyst/grantlee,cutelyst/grantlee,cutelyst/grantlee,simonwagner/grantlee,simonwagner/grantlee,simonwagner/grantlee,simonwagner/grantlee,cutelyst/grantlee,simonwagner/grantlee