Added basic instructions

src/editor/js/components/editor.tsx

@@ -375,6 +375,14 @@ export class Editor extends React.PureComponent<propTypes, stateTypes> {
                             onChange={this.onHistoryChange}
                         />
                         <hr />
+                        <ul>
+                            <li>Click background to create node</li>
+                            <li>Click node to select and edit</li>
+                            <li>CTRL+Click node to delete</li>
+                            <li>Click link to delete</li>
+                            <li>Drag node close to other node to connect</li>
+                        </ul>
+                        <hr />
                         <NodeDetails
                             selectedNode={this.state.selectedNode}
                             allTypes={