QtNodeEditor

Node editor for directed acyclic graph. supports multiple input/output slots and links. It is used by my animation editor which needs a composition graph.

##Features:

1. Node/link add and remove.
2. Drag & drop for links
3. Signals for node/link add and remove.

##Usage:

1. Open "demo/QtNodeEditorDemo.pro" in QtCreator.
2. See "demo/nodeeditor.cpp" for usage.