Broken links for example websites

[OverkillGuy]

In the main website, github links for minitwit and flaskr are broken.
That's a shame because I'd love to see them.

flask-website/flask_website/templates/general/index.html

Line 89 in 09f35e6

<li><a href=http://github.com/pallets/flask/tree/master/examples/flaskr/>flaskr</a>

flask-website/flask_website/templates/general/index.html

Line 91 in 09f35e6

<li><a href=http://github.com/pallets/flask/tree/master/examples/minitwit/>minitwit</a>

[davidism]

pallets/flask#2676

[davidism]

These are fixed.