enable CI

.travis.yml

@@ -0,0 +1,15 @@
+language: python
+
+python:
+  - "3.6"
+
+install:
+  - pip install -r requirements.txt
+  - pip install codecov pytest pytest-cov
+
+script:
+  - pytest --cov=./ -v
+  - pylint --rcfile=.pylintrc encryption host kademlia libp2p network peer stream_muxer transport tests
+
+after_success:
+  - codecov

README.md

@@ -1,4 +1,6 @@
-# py-libp2p
+# py-libp2p [![Build Status](https://travis-ci.com/zixuanzh/py-libp2p.svg?branch=master)](https://travis-ci.com/zixuanzh/py-libp2p) [![codecov](https://codecov.io/gh/zixuanzh/py-libp2p/branch/master/graph/badge.svg)](https://codecov.io/gh/zixuanzh/py-libp2p)
+
+
 
 <h1 align="center">
   <img width="250" align="center" src="https://github.com/zixuanzh/py-libp2p/blob/master/assets/py-libp2p-logo.png?raw=true" alt="py-libp2p hex logo" />