Upgrade to coverage 3.7.1 and have it auto-build itself on first use.

third_party/coverage-3.6/PKG-INFO

Index: third_party/coverage-3.6/PKG-INFO
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-Metadata-Version: 1.1
-Name: coverage
-Version: 3.6
-Summary: Code coverage measurement for Python
-Home-page: http://nedbatchelder.com/code/coverage
-Author: Ned Batchelder and others
-Author-email: ned@nedbatchelder.com
-License: BSD
-Description: Coverage.py measures code coverage, typically during test execution. It uses
-        the code analysis tools and tracing hooks provided in the Python standard
-        library to determine which lines are executable, and which have been executed.
-        
-        Coverage.py runs on Pythons 2.3 through 3.3, and PyPy 1.9.
-        
-        Documentation is at `nedbatchelder.com <http://nedbatchelder.com/code/coverage>`_.  Code repository and issue
-        tracker are at `bitbucket.org <http://bitbucket.org/ned/coveragepy>`_.
-        
-        New in 3.6: ``--fail-under``, and >20 bugs closed.
-        
-        New in 3.5: Branch coverage exclusions, keyboard shortcuts in HTML report.
-        
-        New in 3.4: Better control over source to measure, and unexecuted files
-        can be reported.
-        
-        New in 3.3: .coveragerc files.
-        
-        New in 3.2: Branch coverage!
-Keywords: code coverage testing
-Platform: UNKNOWN
-Classifier: Environment :: Console
-Classifier: Intended Audience :: Developers
-Classifier: License :: OSI Approved :: BSD License
-Classifier: Operating System :: OS Independent
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 3
-Classifier: Topic :: Software Development :: Quality Assurance
-Classifier: Topic :: Software Development :: Testing
-Classifier: Development Status :: 5 - Production/Stable