ignore coverage.xml and move xml generation to tox ini

.gitignore

@@ -29,6 +29,7 @@ pip-log.txt
 .coverage
 .tox
 nosetests.xml
+coverage.xml
 htmlcov
 
 # Translations

.travis.yml

@@ -29,5 +29,4 @@ install:
 script: tox -e $TOX_ENV
 
 after_success:
-  - coverage xml --omit=apps.py,*/migrations/*,*/__init__.py
   - codecov -e TOX_ENV

tox.ini

@@ -8,6 +8,7 @@ envlist =
 setenv =
     PYTHONPATH = {toxinidir}:{toxinidir}/longclaw
 commands = coverage run --source longclaw runtests.py
+           coverage xml --omit=apps.py,*/migrations/*,*/__init__.py
 deps =
     django-18: Django>=1.8,<1.9
     django-19: Django>=1.9,<1.10