fixes #977 Want status tags for CircleCI, and coverage report.
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index b091d06..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-language: c
-sudo: false
-matrix:
-  include:
-    - os: linux
-      compiler: gcc
-    - os: linux
-      compiler: clang
-#    - os: osx
-#      compiler: gcc
-    - os: osx
-      compiler: clang
-before_script:
-  - gem install asciidoctor
-script:
-  # Print all environment variables to aid in CI development
-  - printenv
-  # Print version and available CMake generators to aid in CI development
-  - cmake --version
-  - cmake --help
-  # Perform out-of-source build
-  - mkdir build
-  - cd build
-  # Perform CMake backend generation, build, and test
-  - cmake ..
-  - cmake --build . -- -j4
-  - ctest --output-on-failure -C Debug -j4
-#deploy:
-#  provider: releases
-#  api_key:
-#    secure: fVMvvlhsginfIB7gEhAoKG7xzvF6D94yl8Z+jjfHQG4YtG3SScKVeQUnpWK7NhT90uoUfPnxd5dN3ZWlApoLBSz7iVD0sT1+VGYerM0Gn3LTUj3xvTB3WAAft6YePKhQeJfduzSNqsRjQ7buKgI1SFH0Ek5xwZe4Kl/O/D2Tsw0=
-#  file:
-#    - nanomsg-${TRAVIS_TAG}.zip
-#    - nanomsg-${TRAVIS_TAG}.tar.gz
-#    - nanomsg-${TRAVIS_TAG}.tar.bz2
-#  skip_cleanup: true
-#  on:
-#    tags: true
-#    repo: nanomsg/nanomsg
diff --git a/README.md b/README.md
index 3b271f0..08a17f8 100644
--- a/README.md
+++ b/README.md
@@ -3,8 +3,9 @@
 
 [![Release](https://img.shields.io/github/release/nanomsg/nanomsg.svg)](https://github.com/nanomsg/nanomsg/releases/latest)
 [![MIT License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/nanomsg/nanomsg/blob/master/COPYING)
-[![Linux Status](https://img.shields.io/travis/nanomsg/nanomsg/master.svg?label=linux)](https://travis-ci.org/nanomsg/nanomsg)
+[![Linux Status](https://img.shields.io/circleci/project/github/nanomsg/nanomsg/master.svg?label=linux)](https://circleci.com/gh/nanomsg/nanomsg)
 [![Windows Status](https://img.shields.io/appveyor/ci/nanomsg/nanomsg/master.svg?label=windows)](https://ci.appveyor.com/project/nanomsg/nanomsg)
+[![Coverage](https://codecov.io/gh/nanomsg/nanomsg/branch/master/graph/badge.svg?label=coverage)](https://codecov.io/gh/nanomsg/nanomsg)
 [![Gitter](https://img.shields.io/badge/gitter-join-brightgreen.svg)](https://gitter.im/nanomsg/nanomsg)
 
 The nanomsg library is a simple high-performance implementation of several