Added configuration for 'coverage'

.coveragerc

@@ -0,0 +1,19 @@
+[run]
+branch = True
+source = pycam
+
+[report]
+exclude_lines =
+    # Have to re-enable the standard pragma
+    pragma: no cover
+    # Don't complain about missing debug-only code:
+    def __repr__
+    if self\.debug
+    # Don't complain if tests don't hit defensive assertion code:
+    raise AssertionError
+    raise NotImplementedError
+    # Don't complain if non-runnable code isn't run:
+    if __name__ == .__main__.:
+
+[html]
+directory = build/coverage-report

.gitignore

@@ -11,6 +11,7 @@ build
 eggs
 *.egg-info
 .svn
+.coverage
 
 .DS_Store*
 ehthumbs.db