Directory Restructure (#1163)

* Move tests -> testing

* Directory restructure

* Update Cargo.toml during restructure

* Update Makefile during restructure

* Fix arbitrary path

crypto/eth2_keystore/src/lib.rs

@@ -0,0 +1,15 @@
+//! Provides a JSON keystore for a BLS keypair, as specified by
+//! [EIP-2335](https://eips.ethereum.org/EIPS/eip-2335).
+
+mod derived_key;
+mod keystore;
+mod plain_text;
+
+pub mod json_keystore;
+
+pub use keystore::{
+    decrypt, default_kdf, encrypt, keypair_from_secret, Error, Keystore, KeystoreBuilder, DKLEN,
+    HASH_SIZE, IV_SIZE, SALT_SIZE,
+};
+pub use plain_text::PlainText;
+pub use uuid::Uuid;