3D View boarder/lasso select tool options

Add tool options to control how select operates (add/sub/set/and/xor).

Note: edit mode armature select still needs to support all options,
this is complicated by how it handles partial end-point selection.

source/blender/editors/space_action/action_select.c

@@ -62,6 +62,7 @@
 #include "ED_keyframes_edit.h"
 #include "ED_markers.h"
 #include "ED_screen.h"
+#include "ED_select_utils.h"
 
 #include "WM_api.h"
 #include "WM_types.h"