fix(docs): remove coveralls badge and mentions of coverage stats

The "95% passing" badge is stale since we don't use Travis-ci.org now,
and regardless was only summarizing coverage on the controller/
subproject. It would be great to roll up the coverage stats we do have
in the Go and Python subprojects and summarize that number in the
README, but for now we should hide this misleading number. Likewise,
the .travis.yml file was removed as it can only lead people astray
at this point.

Author: mboersma

.travis.yml

@@ -3,7 +3,6 @@
 Deis (pronounced DAY-iss) is an open source PaaS that makes it easy to deploy and manage applications on your own servers. Deis builds upon [Docker](http://docker.io/) and [CoreOS](http://coreos.com) to provide a lightweight PaaS with a [Heroku-inspired](http://heroku.com) workflow.
 
 [![Build Status](https://travis-ci.org/deis/deis.png?branch=master)](https://travis-ci.org/deis/deis)
-[![Coverage Status](https://coveralls.io/repos/deis/deis/badge.png?branch=master)](https://coveralls.io/r/deis/deis?branch=master)
 [![Current Release](http://img.shields.io/badge/release-v0.10.0-blue.svg)](https://github.com/deis/deis/releases/tag/v0.10.0)
 
 ![Deis Graphic](https://s3-us-west-2.amazonaws.com/deis-images/deis-graphic.png)

README.md

@@ -60,7 +60,7 @@ setup.cfg file in the project root.
 -----------------
 
 Once your code passes the style checker, run the test suite and
-ensure that everything passes and that code coverage has not declined.
+ensure that everything passes.
 
 .. code-block:: console
 
@@ -77,17 +77,9 @@ ensure that everything passes and that code coverage has not declined.
     coverage html
 
 If a test fails, fixing it is obviously the first priority. And if you
-have introduced new code, it must be accompanied by unit tests.
-
-In the example above, all tests passed and ``coverage`` created a report
-of what code was exercised while the tests were running. Open the file
-``htmlcov/index.html`` under the project's root and ensure that the
-overall coverage percentage has not receded as a result of your
-changes. Current test coverage can be found here:
-
-.. image:: https://coveralls.io/repos/deis/deis/badge.png?branch=master
-    :target: https://coveralls.io/r/deis/deis?branch=master
-    :alt: Coverage Status
+have introduced new code, it must be accompanied by unit tests. A report
+of what lines of code were exercised by the tests will be
+in htmlcov/index.html.
 
 
 .. _pull_request: