Directory Restructure (#1163)

* Move tests -> testing

* Directory restructure

* Update Cargo.toml during restructure

* Update Makefile during restructure

* Fix arbitrary path

testing/ef_tests/src/lib.rs

@@ -0,0 +1,19 @@
+use types::EthSpec;
+
+pub use case_result::CaseResult;
+pub use cases::Case;
+pub use cases::{
+    FinalUpdates, JustificationAndFinalization, RegistryUpdates, RewardsAndPenalties, Slashings,
+};
+pub use error::Error;
+pub use handler::*;
+pub use type_name::TypeName;
+
+mod bls_setting;
+mod case_result;
+mod cases;
+mod decode;
+mod error;
+mod handler;
+mod results;
+mod type_name;