Add google-visualization-python project to Melange repository.
This python module will be used with our Statistics module to leverage Google Visualization API and python as a data source.
Coverage: code coverage testing for Python
Coverage.py is a Python module that measures code coverage 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.
For more information, see http://nedbatchelder.com/code/modules/coverage.html