Update Travis CI URL because always https.

Author: kuyan

docs/scenarios/ci.rst

@@ -53,7 +53,7 @@ which provides the following features:
 
 Travis-CI
 ---------
-`Travis-CI <http://travis-ci.org/>`_ is a distributed CI server which builds tests
+`Travis-CI <https://travis-ci.org/>`_ is a distributed CI server which builds tests
 for open source projects for free. It provides multiple workers to run Python tests
 on and seamlessly integrates with Github. You can even have it comment on your Pull
 Requests whether this particular changeset breaks the build or not. So if you are
@@ -83,6 +83,6 @@ notifications, before and after steps and much more. The
 `travis-ci docs <http://about.travis-ci.org/docs/>`_ explain all of those and are very
 thorough.
 
-In order to activate testing for your project, go to `the travis-ci site <http://travis-ci.org/>`_
+In order to activate testing for your project, go to `the travis-ci site <https://travis-ci.org/>`_
 and login with your Github account. Then activate your project in your profile settings and that's
 it. From now on, your project's tests will be run on every push to Github.