TST : enable coveralls

 - also update nose

.coveragerc

@@ -0,0 +1,10 @@
+[run]
+source=matplotlib
+[report]
+omit =
+ */python?.?/*
+ */site-packages/nose/*
+ *test*
+
+exclude_lines =
+ raise NotImplemented

.travis.yml

@@ -67,7 +67,7 @@ install:
  pip install $PRE python-dateutil $NUMPY pyparsing!=2.0.4 pillow sphinx!=1.3.0;
  fi
  # Always install from pypi
- - pip install $PRE pep8 cycler
+ - pip install $PRE pep8 cycler coveralls coverage
  - 'pip install https://github.com/tacaswell/nose/zipball/mnt_py36_compat#egg=nose'
 
  # We manually install humor sans using the package from Ubuntu 14.10. Unfortunatly humor sans is not
@@ -165,3 +165,4 @@ after_success:
  fi
  fi
  fi
+ coveralls

tests.py

@@ -23,6 +23,10 @@
 def run(extra_args):
  from nose.plugins import multiprocess
 
+ env = {"NOSE_WITH_COVERAGE": 1,
+ 'NOSE_COVER_PACKAGE': 'matplotlib',
+ 'NOSE_COVER_HTML': 1}
+
  matplotlib._init_tests()
 
  # Nose doesn't automatically instantiate all of the plugins in the
@@ -33,8 +37,8 @@ def run(extra_args):
 
  nose.main(addplugins=[x() for x in plugins],
  defaultTest=default_test_modules,
- argv=sys.argv + extra_args)
-
+ argv=sys.argv + extra_args,
+ env=env)
 
 if __name__ == '__main__':
  extra_args = []