Made multiple managers for individual pieces

Added UIManager that renders the UI inside the window

BarinkEngine/Input/InputManager.cpp

@@ -0,0 +1,19 @@
+#include "Input/InputManager.h"
+
+void BarinkEngine::InputManager::PollEvents()
+{
+
+	for (std::vector<BarinkWindow*>::iterator it = windows.begin(); it != windows.end(); ++it) {
+		(*it)->Poll();
+	}
+}
+
+void BarinkEngine::InputManager::attach(BarinkWindow* window)
+{
+	windows.push_back(window);
+}
+
+BarinkEngine::InputManager::InputManager()
+{
+	windows = std::vector<BarinkWindow*>();
+}