TST : enable coveralls

 - also update nose

Author: tacaswell

.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 = []