Overhaul crypto (Schnorr/Ristretto, HDKD, BIP39) (#1795)

* Rijig to Ristretto

* Rebuild wasm

* adds compatibility test with the wasm module

* Add Ed25519-BIP39 support

* Bump subkey version

* Update CLI output

* New keys.

* Standard phrase/password/path keys.

* Subkey uses S-URI for secrets

* Move everything to use new HDKD crypto.

* Test fixes

* Ignore old test vector.

* fix the ^^ old test vector.

* Fix tests

* Test fixes

* Cleanups

* Fix broken key conversion logic in grandpa

CC @rphmeier

* Remove legacy Keyring usage

* Traitify `Pair`

* Replace Ed25519AuthorityId with ed25519::Public

* Expunge Ed25519AuthorityId type!

* Replace Sr25519AuthorityId with sr25519::Public

* Remove dodgy crypto type-punning conversions

* Fix some tests

* Avoid trait

* Deduplicate DeriveJunction string decode

* Remove cruft code

* Fix test

* Minor removals

* Build fix

* Subkey supports sign and verify

* Inspect works for public key URIs

* Remove more crypto type-punning

* Fix typo

* Fix tests

substrate/srml/grandpa/Cargo.toml

@@ -16,6 +16,7 @@ primitives = { package = "sr-primitives", path = "../../core/sr-primitives", def
 srml-support = { path = "../support", default-features = false }
 system = { package = "srml-system", path = "../system", default-features = false }
 session = { package = "srml-session", path = "../session", default-features = false }
+consensus = { package = "srml-consensus", path = "../consensus", default-features = false }
 finality-tracker = { package = "srml-finality-tracker", path = "../finality-tracker", default-features = false }
 
 [dev-dependencies]
@@ -33,6 +34,7 @@ std = [
 	"srml-support/std",
 	"primitives/std",
 	"system/std",
+	"consensus/std",
 	"session/std",
 	"finality-tracker/std",
 ]