Add python-matplotlib to ubuntu-precise; resolves travis-ci/apt-package-whitelist#1193
Add python-matplotlib to ubuntu-precise; resolves travis-ci/apt-package-whitelist#1193

Packages: python-matplotlib python3-matplotlib python-matplotlib-data python-matplotlib-doc python-matplotlib-dbg python3-matplotlib-dbg

AlCutter/apt-package-whitelist,AlCutter/apt-package-whitelist,travis-ci/apt-package-whitelist,travis-ci/apt-package-whitelist