Add badges to README.

.travis.yml

@@ -1,12 +1,15 @@
 language: python
 sudo: false
 
+os:
+  - osx
+  - linux
+
 python:
   - "2.7"
   - "3.4"
   - "3.5"
   - "3.6"
-  - "pypy-5.7"
   - "pypy3.5-5.7.1-beta"
 
 cache:
@@ -27,7 +30,3 @@ install:
 script:
   - pre-commit run --all-files
   - python setup.py test
-
-
-after_success:
-  - coveralls

README

@@ -1,4 +1,6 @@
 == fido-host
+image:https://travis-ci.org/Yubico/python-fido-host.svg?branch=master["Travis CI Status", link="https://travis-ci.org/Yubico/python-fido-host"]
+image:https://ci.appveyor.com/api/projects/status/8orx9nbdfq52w47s/branch/master?svg=true["Appveyor Status", link="https://ci.appveyor.com/project/Yubico53275/python-fido-host/branch/master"]
 Provides library functionality for communicationg with a FIDO device over USB.
 
 WARNING: The state of this project is alpha. Expect things to change and break at any time!