[EDIT][#] Swapped the DirectX stuff to use a library that specializes in simple 2D things

[EDIT][+] Added texture for node (temporary -- cannot be resized).
[EDIT][#] Moved render code into a method inside the node
[EDIT][#] Updated SlimDX
[EDIT][#] Fixed name of NodeEditor to the more sensible EditorNode
[EDIT][+] EditorWindow adds internal ports, EditorNode adds external ports

[EDIT][+] Rendering of ports