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/CSocket.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <LibCore/CIODevice.h>
+#include <LibCore/CSocketAddress.h>
+
+class CNotifier;
+
+class CSocket : public CIODevice {
+public:
+    enum class Type {
+        Invalid,
+        TCP,
+        UDP
+    };
+    virtual ~CSocket() override;
+
+    bool connect(const String& hostname, int port);
+    bool connect(const CSocketAddress&, int port);
+
+    ByteBuffer receive(int max_size);
+    bool send(const ByteBuffer&);
+
+    bool is_connected() const { return m_connected; }
+
+    CSocketAddress source_address() const { return m_source_address; }
+    int source_port() const { return m_source_port; }
+
+    CSocketAddress destination_address() const { return m_source_address; }
+    int destination_port() const { return m_destination_port; }
+
+    Function<void()> on_connected;
+
+    virtual const char* class_name() const override { return "CSocket"; }
+
+protected:
+    CSocket(Type, CObject* parent);
+
+    CSocketAddress m_source_address;
+    CSocketAddress m_destination_address;
+    int m_source_port { -1 };
+    int m_destination_port { -1 };
+    bool m_connected { false };
+
+private:
+    virtual bool open(CIODevice::OpenMode) override { ASSERT_NOT_REACHED(); }
+    Type m_type { Type::Invalid };
+    OwnPtr<CNotifier> m_notifier;
+};