improve coverage settings, add test_requirements

.coveragerc

@@ -1,2 +1,6 @@
 [run]
 include = apps*
+omit = apps/cyklomapa/migrations*
+plugins =
+    django_coverage_plugin
+branch = True

.travis.yml

@@ -17,7 +17,7 @@ before_script:
   - npm install uglify-js -g
   - psql -c 'create database travis_ci_test;' -U postgres
   - psql --no-password travis_ci_test -U postgres -c "create extension postgis"
-  - pip install coverage coveralls
+  - pip install -r test_requirements.txt
   - cd project && cp settings_local_sample.py settings_local.py && cd ..
   - pip install -q "$DJANGO_VERSION"
   - python manage.py collectmedia --noinput

requirements.txt

@@ -26,7 +26,6 @@ django-feedback
 
 django-compressor
 lxml
--e git+https://github.com/PetrDlouhy/django-admin-smoke-tests.git#egg=django-admin-smoke-tests
 freezegun
 wsgiunproxy
 django-media-fixtures

test_requirements.txt

@@ -0,0 +1,4 @@
+coverage
+coveralls
+django_coverage_plugin
+-e git+https://github.com/PetrDlouhy/django-admin-smoke-tests.git#egg=django-admin-smoke-tests