v0.19.0-dev.5

Changed

• Simplify zome call parameters. cap_secret, provenance and payload are optional parameters of a CallZomeRequest. If implicit zome call signing is used, which happens when calling a zome with a CallZomeRequest, provenance and cap_secret are automatically set with the authorized signing credentials. It is still possible to call a cell by its role name instead of its cell id. Alternatively to passing in a CallZomeRequest, callZome can be invoked with a signed request CallZomeRequestSigned, where the zome call parameters have already been serialized and signed.