First pass at coveralls integration.

This adds `cover` and `coveralls` envs in `tox`, and a call to `coveralls` in
`.travis.yml`.

Settling for 60% coverage for now.

.coveragerc

@@ -0,0 +1,7 @@
+[report]
+omit = */samples/*
+exclude_lines =
+    # Re-enable the standard pragma
+    pragma: NO COVER
+    # Ignore debug-only repr
+    def __repr__

.gitignore

@@ -7,3 +7,8 @@ docs/
 
 # Test files
 .tox/
+
+# Coverage files
+.coverage
+coverage.xml
+nosetests.xml

.travis.yml

@@ -13,5 +13,7 @@ install:
   - pip install tox
 script:
   - tox -e $TOX_ENV
+after_success:
+  - tox -e coveralls
 notifications:
   - email: false

tox.ini

@@ -3,7 +3,8 @@ envlist = py26openssl13, py26openssl14,
           py27openssl13, py27openssl14,
                          py33openssl14,
                          py34openssl14,
-          pypyopenssl13, pypyopenssl14
+          pypyopenssl13, pypyopenssl14,
+          cover
 
 [testenv]
 deps = keyring
@@ -58,3 +59,23 @@ deps = {[testenv]deps}
 [testenv:pypyopenssl14]
 deps = {[testenv]deps}
     pyopenssl==0.14
+
+[testenv:cover]
+basepython =
+    python2.7
+commands =
+    nosetests --with-xunit --with-xcoverage --cover-package=oauth2client --nocapture --cover-erase --cover-tests --cover-branches --ignore-files=test_appengine\.py --cover-min-percentage=60
+deps = {[testenv]deps}
+    coverage>=3.6,<3.99
+    nosexcover
+    rsa
+    pyopenssl==0.14
+
+[testenv:coveralls]
+basepython = {[testenv:cover]basepython}
+commands =
+    {[testenv:cover]commands}
+    coveralls
+deps =
+    {[testenv:cover]deps}
+    coveralls