add 'shapes' package to collect shape classes

SketchWidget.py

@@ -5,8 +5,7 @@ import gtk.gtkgl
 
 from OpenGL.GL import *
 
-from Line import Line
-from Circle import Circle
+from shapes import *
 
 class SketchWidget:
     def __init__(self, sketch):

shapes.py

@@ -0,0 +1,3 @@
+
+from Line import *
+from Circle import *