Add travis and coveralls informations

.coveragerc

@@ -0,0 +1,5 @@
+[report]
+omit =
+    tests/*
+    */python?.?/*
+    */site-packages/nose/*

.travis.yml

@@ -0,0 +1,17 @@
+language: python
+python:
+  - "2.6"
+  - "2.7"
+  - "3.2"
+  - "3.3"
+
+install:
+  - "pip install coverage"
+  - "pip install nose"
+  - "pip install coveralls"
+  - "pip install -e .[testing]"
+
+script: "nosetests -v --with-coverage --cover-package=crank --cover-erase"
+
+after_success:
+  coveralls