added coveragerc

.coveragerc

@@ -0,0 +1,34 @@
+# .coveragerc to control coverage.py
+[run]
+branch = False
+omit = 
+    */__init__.py
+    odl/diagnostics/*
+    odl/util/*
+    test/*
+    run_tests.py
+
+[report]
+# Regexes for lines to exclude from consideration
+exclude_lines =
+    # Have to re-enable the standard pragma
+    pragma: no cover
+
+    # Don't complain about missing debug-only code:
+    def __str__    
+    def __repr__
+    if self\.debug
+
+    # Don't complain if tests don't hit defensive assertion code:
+    raise AssertionError
+    raise NotImplementedError
+    return NotImplemented
+
+    # Don't complain if non-runnable code isn't run:
+    if 0:
+    if __name__ == '__main__': 
+
+ignore_errors = True
+
+[html]
+directory = htmlcov