Implement native login and session initialization (#56)

tests/compat/tests/core_runtime_shims.rs

@@ -7,14 +7,6 @@ use libremetaverse::{
 };
 use libremetaverse_types::compat::{CancellationToken, EventHandler, IProgress, Subscription, Uri};
 
-fn member_id<T>(result: Result<T, libremetaverse::Error>) -> &'static str {
-    result
-        .err()
-        .expect("failure-only shim unexpectedly returned a value")
-        .csharp_member()
-        .expect("failure-only shim error")
-}
-
 async fn compile_login_shutdown_flows(
     network: &NetworkManager,
     limiter: &CapsRateLimiter,
@@ -102,10 +94,7 @@ fn client_and_settings_construct_without_starting_runtime_work() {
         libremetaverse::ClientLifecycleState::Disposed
     );
 
-    assert_eq!(
-        member_id(CapsRateLimiter::new_with_constructor()),
-        "M:LibreMetaverse.CapsRateLimiter.#ctor"
-    );
+    let _limiter = CapsRateLimiter::new_with_constructor().expect("CAPS rate limiter");
     let udp_buffer = UDPPacketBuffer::new_with_constructor().expect("UDP packet buffer");
     assert_eq!(udp_buffer.data.len(), 4096);
     assert_eq!(udp_buffer.data_length, 0);