Explicit proxy runner + closing local connection if remote is over (#314)

* Updated built dependency

So that it wouldn't fail on nwindows

* Concurrent RW client-side

* Draft of a ProxyRunner

* Super experimental proxy runner for provider

Very much WIP

* Extracting shared code + cleanup

* Logging cleanup

* Removed redundant close request

common/crypto/src/asymmetric/encryption/mod.rs

@@ -100,7 +100,7 @@ impl PemStorableKeyPair for KeyPair {
     }
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Copy, Clone)]
 pub struct PublicKey(x25519_dalek::PublicKey);
 
 impl PublicKey {