Remove dead links and update repository metadata

CommonMPL.py

@@ -5,8 +5,7 @@
 tutorial on integrating matplotlib with TraitsUI, based on Qt code shared by
 Didrik Pinte (May 2012):
 
-* http://docs.enthought.com/traitsui/tutorials/traits_ui_scientific_app.html
-* http://markmail.org/message/z3hnoqruk56g2bje
+* https://docs.enthought.com/traitsui/tutorials/traits_ui_scientific_app.html
 * https://gist.github.com/pierre-haessig/9838326
 
 Import order matters here. ``pyface.qt`` is imported first so that it resolves

README.md

@@ -152,16 +152,14 @@ explicit connect step. Two consequences worth knowing:
 - The methods are bound when the class is created, so patching one afterwards has no effect.
 
 There is comprehensive documentation for
-[Traits](http://code.enthought.com/projects/traits/documentation.php) and a set of
-[TraitsUI tutorials](http://docs.enthought.com/traitsui/tutorials/index.html). I wrote up
-some additional background [on my site](http://brendangriffen.com/creating-a-GUI-in-Python/), though
-that post covers the older Python2 version.
+[Traits](https://docs.enthought.com/traits/) and a set of
+[TraitsUI tutorials](https://docs.enthought.com/traitsui/tutorials/index.html).
 
 ## Acknowledgments
 
 - [Pierre Haessig](https://gist.github.com/pierre-haessig/9838326) for the Qt matplotlib editor.
 - Gael Varoquaux's
-  [TraitsUI scientific application tutorial](http://docs.enthought.com/traitsui/tutorials/traits_ui_scientific_app.html),
+  [TraitsUI scientific application tutorial](https://docs.enthought.com/traitsui/tutorials/traits_ui_scientific_app.html),
   and Didrik Pinte for the original Qt version.
 
 ## License