* gtk/NodeStore.cs (GetNode): New public function. Patch refactored a bit to eliminate code duplication with get_node_cb. svn path=/trunk/gtk-sharp/; revision=20188
* glib/Value.cs : add set to Val prop * glue/Makefile.am : build nodestore.c * glue/makefile.win32 : link nodestore.o * glue/nodestore.c : new, glue for TreeModel implementation * gtk/NodeStore.cs : new tree store implementation * gtk/ITreeNode.cs : new interface for nodestore node types * gtk/TreeNode.cs : abstract class for deriving nodestore nodes * gtk/TreeNodeAttribute.cs : tree node marking attr * gtk/TreeNodeValueAttribute.cs : node column marking attr * gtk/TreeView.custom : add ctor(NodeStore) svn path=/trunk/gtk-sharp/; revision=19630