Libraries: Create top level directory for libraries.

Things were getting a little crowded in the project root, so this patch
moves the Lib*/ directories into Libraries/.

Libraries/LibCore/CNetworkJob.cpp

@@ -0,0 +1,43 @@
+#include <LibCore/CNetworkJob.h>
+#include <LibCore/CNetworkResponse.h>
+#include <stdio.h>
+
+CNetworkJob::CNetworkJob()
+{
+}
+
+CNetworkJob::~CNetworkJob()
+{
+}
+
+void CNetworkJob::did_finish(NonnullRefPtr<CNetworkResponse>&& response)
+{
+    m_response = move(response);
+    printf("%s{%p} job did_finish!\n", class_name(), this);
+    ASSERT(on_finish);
+    on_finish(true);
+    delete_later();
+}
+
+void CNetworkJob::did_fail(Error error)
+{
+    m_error = error;
+    dbgprintf("%s{%p} job did_fail! error: %u (%s)\n", class_name(), this, (unsigned)error, to_string(error));
+    ASSERT(on_finish);
+    on_finish(false);
+    delete_later();
+}
+
+const char* to_string(CNetworkJob::Error error)
+{
+    switch (error) {
+    case CNetworkJob::Error::ProtocolFailed:
+        return "ProtocolFailed";
+    case CNetworkJob::Error::ConnectionFailed:
+        return "ConnectionFailed";
+    case CNetworkJob::Error::TransmissionFailed:
+        return "TransmissionFailed";
+    default:
+        return "(Unknown error)";
+    }
+}