Add support for Coveralls.io

.coveragerc

@@ -0,0 +1,15 @@
+# .coveragerc to control coverage.py
+[run]
+branch = True
+
+[report]
+# Regexes for lines to exclude from consideration
+exclude_lines =
+    # Have to re-enable the standard pragma
+    pragma: no cover
+
+    # No need to test __repr__
+    def __repr__
+
+    # Python 2/3 compatibility
+    except ImportError

.travis.yml

@@ -12,4 +12,8 @@ install:
 
 script:
   - make lint
-  - py.test .
+  - coverage run --source=soco py.test .
+  - py.test --cov-config .coveragerc --cov soco .
+
+after_script:
+  - coveralls

requirements-dev.txt

@@ -5,3 +5,4 @@ mock >= 1.0.1
 graphviz
 flake8
 pylint
+coveralls