add converage

.coveralls.yml

@@ -0,0 +1 @@
+repo_token: Dv2YstJoD15nLmJr9siyPUnRFLugsZDsn

.travis.yml

@@ -8,5 +8,10 @@ python:
   - "3.5"
   - "3.6"
   - "nightly"
+install:
+  - pip install coveralls
 script:
-  - py.test
+  - py.test
+  - coverage run --source=dict setup.py test
+after_success:
+  - coveralls

README.rst

@@ -1,12 +1,20 @@
 dict
 ====
 
-|status| |github-release| |pypi-release| |pyversion| |license| |star|
+|status| |build| |converage| |github-release| |pypi-release| |pyversion| |license| |star|
 
 .. |status| image:: https://img.shields.io/pypi/status/dict-cli.svg
     :alt: Status
     :target: https://pypi.python.org/pypi/dict-cli
 
+.. |build| image:: https://img.shields.io/travis/wufeifei/dict.svg
+    :alt: Build Status
+    :target: https://pypi.python.org/pypi/dict-cli
+
+.. |converage| image:: https://img.shields.io/coveralls/wufeifei/dict.svg
+    :alt: Code Test Converage
+    :target: https://coveralls.io/github/wufeifei/dict
+
 .. |github-release| image:: https://img.shields.io/github/release/wufeifei/dict.svg
     :alt: GitHub Release
     :target: https://github.com/wufeifei/dict/releases