Merge pull request #27 from Erotemic/conform_to_set_api

Conform to set API, update to pytest, add CI badges

.coveragerc

@@ -0,0 +1,3 @@
+[run]
+branch = True
+source = ordered_set.py

.gitignore

@@ -5,3 +5,6 @@
 *.egg-info
 dist/
 .tox/
+.coverage
+.pytest_cache
+htmlcov

.travis.yml

@@ -0,0 +1,30 @@
+language: python
+sudo: false
+
+cache:
+  apt: true
+  directories:
+  - $HOME/.cache/pip
+  - $HOME/download
+python:
+  - "2.6"
+  - "2.7"
+  - "3.3"
+  - "3.4"
+  - "3.5"
+  - "3.6"
+before_install:
+  - pip install pip -U
+  - pip install pytest -U
+install:
+  - travis_retry pip install -e .
+script: 
+  - travis_wait pytest --doctest-modules --cov-config .coveragerc --cov-report html --cov=ordered_set test.py
+
+after_success: 
+  - codecov 
+cache: 
+    apt: true
+    directories:
+        - $HOME/.pip-cache
+

README → README.md

@@ -1,3 +1,8 @@
+[![Travis](https://img.shields.io/travis/LuminosoInsight/ordered-set/master.svg?label=Travis%20CI)](https://travis-ci.org/LuminosoInsight/ordered-set)
+[![Codecov](https://codecov.io/github/LuminosoInsight/ordered-set/badge.svg?branch=master&service=github)](https://codecov.io/github/LuminosoInsight/ordered-set?branch=master)
+[![Pypi](https://img.shields.io/pypi/v/ordered-set.svg)](https://pypi.python.org/pypi/ordered-set)
+
+
 An OrderedSet is a custom MutableSet that remembers its order, so that every
 entry has an index that can be looked up.