Revert "Merge pull request #200 from sigp/new-structure"

This reverts commit d7a3545be1, reversing
changes made to 1da06c156c.

eth2/attester/src/test_utils/mod.rs

@@ -0,0 +1,7 @@
+mod epoch_map;
+mod local_signer;
+mod simulated_beacon_node;
+
+pub use self::epoch_map::EpochMap;
+pub use self::local_signer::LocalSigner;
+pub use self::simulated_beacon_node::SimulatedBeaconNode;